Database-SQL-RDBMS HOW-TO document for Linux (PostgreSQL
Object Relational Database System)
Al Dev (Alavoor Vasudevan)
[email protected]
v45.0, 27 Jan 2001
This document is a "practical guide" to very quickly setup a SQL
Database engine and front end tools on an Unix system. It also dis�
cusses the International standard language ANSI/ISO SQL and reviews
the merits/advantages of the SQL database engine developed by the
world-wide internet in an "open development" environment. It is about
HOW-TO setup a next generation Object Relational SQL Database "Post�
greSQL" on Unix system which can be used as an Application Database
Server or as a Web Database Server. PostgreSQL attempts to implement
current and future International ISO/ANSI SQL standards. This document
also gives information on the database interface programs like Front
End GUIs, RAD tools (Rapid Application Development), ODBC, JDBC
drivers, "C", "C++", Java, Perl programming interfaces and Web
Database Tools. Information given here applies to all Unix/Windows NT
platforms and to all other SQL databases. It will be very useful for
people who are new to Databases, SQL language and PostgreSQL. This
document also has SQL tutorial, SQL syntax which would be very helpful
for beginners. Experienced people will find this document as an useful
reference guide. For students, the information given here will enable
them to get the source code for PostgreSQL relational database system,
from which they can learn as to how a RDBMS SQL database engine is
created.
______________________________________________________________________
Table of Contents
1. Introduction
1.1 Quantum Computers - Quantum Physics Useful !!
2. Laws of Physics apply to Software!
3. What is PostgreSQL ?
3.1 White Paper
4. Which one? PostgreSQL or MySQL ?
4.1 PostgreSQL defeated Oracle, IBM DB2, MS SQL server and others!!
4.2 MySQL and other duplicate RDBMSes
4.3 Limitations of MySQL
5. Where to get it ?
6. PostgreSQL Quick-Installation Instructions
6.1 Install and Test
6.2 PostgreSQL RPMs
6.3 Maximum RPM
6.4 Examples RPM
6.5 Testing PyGreSQL - Python interface
6.6 Testing Perl - Perl interface
6.7 Testing libpq, libpq++ interfaces
6.8 Testing Java interfaces
6.9 Testing ecpg interfaces
6.10 Testing SQL examples - User defined types and functions
6.11 Testing Tcl/Tk interfaces
6.12 Testing ODBC interfaces
6.13 Testing MPSQL Motif-worksheet interfaces
6.14 Verification
6.15 Emergency Bug fixes
7. Quick Start Guide
7.1 Creating, Dropping, Renaming Database
7.2 Creating, Dropping users
7.3 Creating, Dropping Groups
7.4 Create, Edit, Drop a table
7.5 Create, Edit, Drop records in a table
7.6 Switch active Database
7.7 Backup and Restore database
7.8 Security of database
7.9 Online help
7.10 Creating Triggers and Stored Procedures
7.11 PostgreSQL Documentation
8. Performance Tuning of PostgreSQL server
8.1 OS Tuning for Database server
8.2 Tuning Database server process
9. PostgreSQL Supports Extremely Large Databases greater than 200 Gig
9.1 CPU types - 32-bit or 64-bit
9.2 Multiple CPUs
9.3 Replication Server
10. How can I trust PostgreSQL ? Regression Test Package builds customer confidence
11. Security of Database
11.1 User Authentication
11.2 Host-Based Access Control
11.3 Authentication Methods
11.4 Access Control
11.5 Secure TCP/IP Connection via SSH
11.6 Kerberos Authentication
12. GUI FrontEnd Tool for PostgreSQL (Graphical User Interface)
13. Interface Drivers for PostgreSQL
13.1 ODBC Drivers for PostgreSQL
13.2 UDBC Drivers for PostgreSQL
13.3 JDBC Drivers for PostgreSQL
13.4 Java for PostgreSQL
14. Perl Database Interface (DBI) Driver for PostgreSQL
14.1 Perl interface for PostgreSQL
14.2 Perl Database Interface DBI
14.2.1 WHAT IS DBI ?
14.2.2 DBD driver for PostgreSQL
14.2.3 Technical support for DBI
14.2.4 DBI Documents
14.2.5 Is DBI supported under Windows 95 / NT platforms?
14.2.6 Commercial Support and Training
14.3 Testing Perl interface
15. PostgreSQL Management Tools
15.1 PGACCESS - A GUI Tool for PostgreSQL Management
15.2 GtkSQL Graphical Query Tool for PostgreSQL
15.3 Windows Interactive Query Tool for PostgreSQL (WISQL or MPSQL)
15.4 Interactive Query Tool (ISQL) for PostgreSQL called PSQL
15.5 MPMGR - A Database Management Tool for PostgresSQL
15.6 PgAdmin, PhpPgAdmin tools
15.7 PgBash - SQL shell tool
15.8 Webmin Tool for PostgreSQL
16. CPUs for PostgreSQL
17. Setting up multi-boxes PostgreSQL with just one monitor
18. Web-Application-Servers for PostgreSQL
18.1 PERL Web Application Servers
18.2 PHP Web Application Servers
18.3 Lutris Corp "Enhydra Enterprise" (Java)
18.4 Zope (Python)
18.5 OpenACS (Tcl Language)
18.6 C++, CORBA Web Application Servers
18.7 Pike, Roxen Web Application Server
18.8 Web Application Servers Directory
19. Applications and Tools for PostgreSQL
19.1 PostgreSQL 4GL for web database applications - AppGEN Development System
19.2 WWW Web interface for PostgresSQL - DBENGINE
19.3 Apache Webserver Module for PostgreSQL - NeoSoft NeoWebScript
19.4 HEITML server side extension of HTML and a 4GL language for PostgreSQL
19.5 America On-line AOL Web server for PostgreSQL
19.6 Problem/Project Tracking System Application Tool for PostgreSQL
19.7 Convert dbase dbf files to PostgreSQL
19.8 Convert Microsoft Access MDB database files to PostgreSQL
19.9 Zeos Client
19.10 Report Writer in Java
20. Database Design Tool - Entity Relation Diagram Tool
21. Web Database Design/Implementation tool for PostgreSQL - EARP
21.1 What is EARP ?
21.2 Implementation
21.3 How does it work ?
21.4 Where to get EARP ?
22. PHP Hypertext Preprocessor - Server-side html-embedded scripting language for PostgreSQL
22.1 Major Features
22.2 PHP - Brief History
22.3 So, what can I do with PHP ?
22.4 A simple example
22.5 CGI Redirection
22.5.1 Apache 1.0.x Notes
22.5.2 Netscape HTTPD
22.5.3 NCSA HTTPD
22.6 Running PHP from the command line
22.7 PHPGem package
23. Python Interface for PostgreSQL
23.1 Where to get PyGres ?
23.2 Information and support
23.3 Testing Python interface
24. Gateway between PostgreSQL and the WWW - WDB-P95
24.1 About wdb-p95
24.2 Does the PostgreSQL server, pgperl, and httpd have to be on the same host?
25. "C", "C++", ESQL/C language Interfaces and Bitwise Operators for PostgreSQL
25.1 "C" interface
25.2 "C++" interface
25.3 ESQL/C
25.4 BitWise Operators for PostgreSQL
26. Japanese Kanji Code for PostgreSQL
27. PostgreSQL Port to Windows 95/Windows NT
27.1 Authors of NT port
27.2 Install the Cygwin package
27.3 Tuneup Bash Window
27.4 Install the Andy Piper tools
27.5 Install Ludovic Lange's Cygwin32 IPC package
27.6 Install PostgreSQL
28. Mailing Lists
28.1 E-mail account for PostgreSQL
28.2 English Mailing List
28.3 Archive of Mailing List
28.4 Spanish Mailing List
29. Documentation and Reference Books
29.1 User Guides and Manuals
29.2 Online Documentation
29.3 Useful Reference Textbooks
29.4 ANSI/ISO SQL Specifications documents - SQL 1992, SQL 1998
29.5 Syntax of ANSI/ISO SQL 1992
29.6 Syntax of ANSI/ISO SQL 1998
29.7 SQL Tutorial for beginners
29.8 Temporal Extension to SQL92
29.9 Part 0 - Acquiring ISO/ANSI SQL Documents
29.10 Part 1 - ISO/ANSI SQL Current Status
29.11 Part 2 - ISO/ANSI SQL Foundation
29.12 Part 3 - ISO/ANSI SQL Call Level Interface
29.13 Part 4 - ISO/ANSI SQL Persistent Stored Modules
29.14 Part 5 - ISO/ANSI SQL/Bindings
29.15 Part 6 - ISO/ANSI SQL XA Interface Specialization (SQL/XA)
29.16 Part 7 - ISO/ANSI SQL Temporal
29.16.1 INTRODUCTION
29.16.2 A CASE STUDY - STORING CURRENT INFORMATION
29.16.3 A CASE STUDY - STORING HISTORY INFORMATION
29.16.4 A CASE STUDY - PROJECTION
29.16.5 A CASE STUDY - JOIN
29.16.6 A CASE STUDY - AGGREGATES
29.16.7 SUMMARY
29.17 Part 8 - ISO/ANSI SQL MULTIMEDIA (SQL/MM)
30. Technical support for PostgreSQL
30.1 Commercial Support
31. Economic and Business Aspects
32. List of Other Databases
33. Internet World Wide Web Searching Tips
34. Conclusion
35. FAQ - Questions on PostgreSQL
36. Other Formats of this Document
37. Copyright and License
38. Appendix A - Syntax of ANSI/ISO SQL 1992
39. Appendix B - SQL Tutorial for beginners
39.1 Tutorial for PostgreSQL
39.2 Internet URL pointers
39.3 On-line SQL tutorials
40. Appendix C - Linux Quick Install Instructions
41. Appendix C - Midgard Installation
41.1 Testing Midgard PHP Server
41.2 Security OpenSSL
______________________________________________________________________
1. Introduction
The purpose of this document is to provide comprehensive list of
pointers/URLs to quickly setup PostgreSQL and also to advocate the
benefits of Open Source Code system like PostgreSQL, Linux.
PostgreSQL is pronounced as Post-gres-cue-el (Postgres-QL) and not
Postgre-es-cue-el.
Each and every computer system in the world needs a database to
store/retrieve the information. The primary reason you use the
computer is to store, retrieve and process information and do all
these very quickly, thereby saving you time. At the same time, the
system must be simple, robust, fast, reliable, economical and very
easy to use. Database is the most VITAL SYSTEM as it stores mission
critical information of every company in this world. Each and every
industry in this world needs a database system. Industries like
telecom, automobile, banks, airlines, etc.. will not function
efficiently without a database system. The most popular database
systems are based on the International Standard Organisation (ISO) SQL
specifications and ANSI SQL (American) standards. The current
specifications widely used in the industry are ISO/ANSI SQL 1992.
Upcoming standard is the SQL 1998/99 which is also called SQL-3 is
still under development. Popular database like Oracle, Sybase and
Informix systems are based on these standards or are trying to
implement these standards.
Without a standard like ANSI/ISO SQL, it would be very difficult for
the customer to develop an application once and run on all the
database systems. End user wants to develop an application ONCE using
ISO SQL, ODBC, JDBC and deploy on all variety of database systems in
the world.
The world's most popular FREE Database which implements some of the
ISO SQL, ANSI SQL/98, SQL/92 and ANSI SQL/89 RDBMS is PostgreSQL.
PostgreSQL is next generation Object relational database and is
targeting on full compliance of SQL standards like ISO/ANSI SQL.
PostgreSQL is the only free RDBMS in the world which supports Object
databases and SQL. This document will tell you how-to install the
database, how to set up the Web database, application database, front
end GUIs and interface programs. It is strongly advised that you MUST
write your database applications 100 % compliant to standards of
ISO/ANSI SQL, ODBC, JDBC so that your application is portable across
multiple databases like PostgreSQL, Oracle, Sybase, Informix etc.
You get the highest quality, and lot many features with PostgreSQL as
it follows 'Open Source Code development model'. Open Source Code
model is the one where the complete source code is given to you and
the development takes place on the internet by an extremely vast
network of human brains. Future trend shows that most of the software
development will take place on the so called "Information Super-
Highway" which spans the whole globe. In the coming years, internet
growth will be explosive which will further fuel rapid adoption of
PostgreSQL by the industry.
By applying the principles of statistics, mathematics and science to
software quality, you get the best quality of software only in a 'Open
Source Code System' like PostgreSQL, wherein the source code is open
to a very vast number of human brains inter-connected by the
information super-highway. Greater the number of human brains
working, the better will be the quality of software. Open Source Code
model will also prevent RE-INVENTION OF WHEELS, eliminates DUPLICATION
OF WORK and will be very economical, saves time in distribution and
follows the modern economic laws of optimizing the national and global
resources. Once a software work is done by others, then you DO NOT
need to re-do that again. You will not be wasting your valuable time
on something which had already been WELL DONE. Your time is extremely
precious and it must be utilized efficiently, because you have only 8
hours a day for doing work. As we will be entering the 21st century,
there will be a change in the way that you get software for your use.
Everybody will give first preference for the open source softwares
like PostgreSQL, Linux.
If you buy binaries, you will not get any equity and ownership of
source code. Source code is a very valuable asset and binaries have no
value. Buying software may become a thing of the past. You only need
to buy good hardware, it is worth spending money on the hardware and
get the software from internet. Important point is that it is the
computer hardware which is doing bulk of the work. Hardware is the
real work horse and software is just driving it. Computer hardware is
so much more complex that only 6 nations in the world so far have
demonstrated the capability of designing and manufacturing computer
chips/hardware. Design and manufacturing of computer chips is an
advanced technology. It is a very complex process, capital intensive,
requires large investments in plant and production machines which deal
with 0.18 micron (even smaller than 0.18) technology. On a single
small silicon chip millions of transistors/circuits are densely
packed. Companies like Applied Material, AMD, Intel, Cyrix, Hitachi,
IBM and others spent significant number of man-years to master the
high-technology like Chip Design, Micro-electronics and Nano-
electronics. Micro means (one-millionth of meter 10^-6), Nano means
(one-billionth of meter 10^-9). Current technology uses micro-
electronics of about 0.35 micron using aluminum as conductors and 0.25
micron sizes using copper as conductors of electrons. In near future
the technology of 0.10 micron with copper and even nano-electronics
will be used to make computer chips. Aluminum conductors will be
phased out by copper on computer chips, as copper is a better
conductor of electrons. In photolithography process extreme
ultraviolet, X-ray or electron-beam techniques will be used to etch
circuits for feature size less than 0.15 micron. In about 20 years
from now, silicon chips will be phased out by molecular computers and
bio chips which will be billions of times faster than silicon chips.
Molecules are a group of atoms. And atoms are tiny particles which
makes up everything that you see in this world. Molecular computers
will use the molecules of matter as ultra-fast electronic on/off
switches. When the switch is ON it indicates 1, and when it is OFF it
indicates 0. All the computer programs in this world are based on
binary (numbers 1 and 0). Table below shows the progress and future
advancement trends of computer chips.
Advancement of chip capabilities in future
********************************************
+--------------------------+---------+---------+---------+---------+--------+---------+--------+
| Item/Year | 1997 | 1999 | 2001 | 2003 | 2012 | 2020 | 2030 |
+--------------------------+---------+---------+---------+---------+--------+---------+--------+
| Feature size(micron) | 0.25 | 0.18 | 0.15 | 0.13 | 0.05 |< 0.00001| atomic |
+--------------------------+---------+---------+---------+---------+--------+---------+--------+
| Wafer size(mm) | 200 | 300 | 300 | 300 | 450 | Mol/Bio |Quantum |
+--------------------------+---------+---------+---------+---------+--------+---------+--------+
| Min Operating Voltage | 1.8-2.5 | 1.5-1.8 | 1.2-1.5 | 1.2-1.5 | 0.5-0.6| < 0.001 | minute |
+--------------------------+---------+---------+---------+---------+--------+---------+--------+
| Max power dissipation | 70 | 90 | 110 | 130 | 175 | 600 | minute |
+--------------------------+---------+---------+---------+---------+--------+---------+--------+
| On-chip frequencey (MHz) | 750 | 1,250 | 1,500 | 2,100 | 10,000 | > 50,000| ---- |
+--------------------------+---------+---------+---------+---------+--------+---------+--------+
| DRAM capacity | 256 MB | 1 GB | 2 GB | 4 GB | 256 GB | > 1000GB| ---- |
+--------------------------+---------+---------+---------+---------+--------+---------+--------+
As you can see, it is hardware that is high technology and important
and software is labor intensive but is a less difficult technology.
On other hand, each and every country in the world develops/makes
software. In fact, any person in this world with a small low-cost PC
can write software.
Databases like Oracle, Informix, Sybase, IBM DB2 (Unix) are written
using the "C" language and binaries are created by compiling the
source code and then they are shipped out to customers. Oracle,
Sybase, Informix databases are 100 % "C" programs!!
Since a lot of work had been done on PostgreSQL for the past 14 years,
it does not make sense to re-create from scratch another database
system which satisfies ANSI/ISO SQL. It will be a great advantage to
take the existing code and add missing features or enhancements to
PostgreSQL and start using it immediately.
Prediction is that demand for "Internet products" like PostgreSQL will
grow exponentially as it is capable of maintaining a high quality, low
cost, extremely large user-base and developer-base. Those nations
which do not use the 'Internet products' will be seriously missing
"World-wide Internet Revolution" and will be left far behind other
countries. The reason is "Internet" itself is the world's LARGEST
"software company" and is a large software "power house"!
1.1. Quantum Computers - Quantum Physics Useful !!
As you can see from above table "Advancement of chip capabilities in
future" in the years after 2030, database systems like PostgreSQL will
be running on Quantum Computers. Quantum Computers rely on an atomic
particle's traits, such as direction of spin, for creating a state.
For example, when the spin is up, a particle could be read as "one",
when its spin is down, the particle would be read as "zero". Atoms
and nuclei can exist in a state of superposition, where the values of
one, zero and the range in between can be represented concurrently. By
entangling the spins of atoms, "qubits" can become wired together,
enabling them to function as a collective whole, bringing about a
nonlinear computational power that far surpasses the capabilities of
supercomputers available today!! At atomic level Quantum Physics comes
to assistance to better understand the behaviour of atomic particles.
2. Laws of Physics apply to Software!
In this chapter, it will be shown how science plays an important role
in the creation of various objects like software, this universe, mass,
atoms, energy and even yourself! This chapter also shows why
knowledge of science is very important before you start using the
products of science.
The golden rule is - "You MUST not use a product without understanding
how it is created!!" This rule applies to everything - database
sytems, computer system, operating system, this universe and even your
own human body! It means that you should have complete source code and
information about the system. It is important to understand how human
body and atoms inside human body works since humans are creating
PostgreSQL, MS Windows95 etc..
Creation is a very important step. Persons who are using the objects
of science must know how it is created. This applies to even computer
systems and PostgreSQL. A majority of people do not have knowledge of
science and hence do not know how systems like MS Windows NT/95,
Oracle, human body and this universe are created. A vast majority of
people do not know what made the universe and MS Windows 95/NT and
what is inside it. Complex systems are built from very simple basic
building blocks like - millions of universes are created, each
universe in turn has millions of super-clusters, each super-cluster
has millions of galaxies, each galaxy has millions of stars, some
stars have many planets, each planet in turn is made up billions of
atoms.(In the history of this world, only one universe was created by
a man in ancient India eons ago, but no other case had been reported
in the modern history. There is only one man-made universe) Creating
an universe is a much more advanced technology and is more advanced
than the atomic bomb which was dropped on Hiroshima and Nagasaki
causing horrible destruction. Modern nuclear weapons are so tiny and
powerful that if such a single nuclear bomb is dropped in pacific
ocean then it can completely vaporise the planet earth! The total
variety of weapons are infinity. There are weapons to even terminate
the universes (it is not a good idea to give nuke weapons technology
to every person). Nuclear weapons and other more powerful divine
weapons were used in the battle field in ancient India! Nobody
believed Albert Eienstein (a scientist of 1900's) when he said nuclear
weapons can be made which can vaporise big cities.
Software like MS Windows 95 is created simply by "C" and assembler
language programs which simply uses 1 and 0 and universes like ours
are created simply by dashing TWO dissimilar but proper of combination
of tiny atomic particles of other dimensions. (Something interesting
happened just before dashing of tiny particles) A human body is
created by dashing two dissimilar but proper combination of tiny
cells!! (Something interesting happened just before dashing of tiny
cells) Humans inherited the properties of this universe. The universe
you are currently living in was NOT there - all the atoms inside the
universe was not there and not even TIME was existing!! Baby universe
was born during big bang and started expanding and kept growing. Even
today our universe is still expanding and is not static!! A person
from another universe by name 'Brahma' created this universe you are
currently living in. Knowledge is the MOTHER of this universe!! you
are living was born!! It is a deal similar to how you were born!
Without any 'genes' from Mother Knowledge it is not possible create
even a small "C" program!
At some point our universe will close down (in a big crunch) and all
the atoms inside the universe will completely vanish and dissappear!
All the atoms that you see inside this universe will be gone!
Total number of universes that can be created is INFINITY and
similarly total number of operating systems that can be created is
also infinity!! It is infinite cyclic process where universes are born
and then later die down. There are millions of universes, which are
classified into 3 major categories. Infinite number universes and
infinite variety of multi-dimensional atoms collapse down into few
primary-dimensional-universe. And primary-dimensional universes
collapse down into one single focus entity called 'eeshwar' (eeshara
is a sanskrit word). Very advanced mathematical equations support
this theory.
The laws of science and statistics favour the open-source code system
like PostgreSQL and Linux. As the internet speed is increasing
everyday, and internet is becoming more and MORE reliable, the open-
source code system will gain very rapid momentum. And, if rules of
statistics and laws of physics are correct, awareness of science grows
and when IGNORANT people start learning science then the closed
source-code systems will eventually vanish from this planet.
Developing a project like PostgreSQL requires resources like energy
and time, hence PostgreSQL is a product of energy and time. Since
energy and time can be explained only by science, there is a direct
co-relation between physics and software projects like PostgreSQL,
Linux. Laws of science (Physics) applies everywhere and at all the
times, to anything that you do, even while you are developing the
software projects.
Physics is in action even while you are talking (sound waves), walking
(friction between ground and your feet), reading a book or writing
software. Every science in this world has a deep root in mathematics,
including PostgreSQL. PostgreSQL uses 'Modern Algebra' which is a tiny
branch of mathematics. Modern algebra deals with 'Set Theory',
'Relational Algebra', science of Groups, Rings, Collections, Sets,
Unions, Intersections, Exclusions, Domains, Lists, etc...
The software like PostgreSQL is existing today because of the energy
and time. And mass and energy are ONE and the SAME entity. There are
infinite number of methods to unlock mass and convert it into enery.
Mass is a highly concentrated energy. The fact that mass and energy
are same was unknown to people 100 years ago! And even today it is
unknown to world population that internet is the largest software
"power house" and the largest "software company" in the world!
Cells in the human brains consume energy while processing (creating
software), by converting the chemical energy from food into electrical
and heat energy. Even while you are reading this paragraph, the cells
in your brain are burning out the fuel and are using tiny amounts of
energy. All of these implies that human brain is a thermodynamic heat
engine. Because human brain is a thermodynamic engine, the laws of
thermodynamics applies to brain and hence thermodynamics has indirect
effects on software like PostgreSQL.
There can be infinite number of colors, computer langauages, computer
chip designs and theories but there CANNOT be ONE SINGLE PERFECT
color, computer language, design or system! What you can have is only
a NEAR PERFECT color(wavelength), system, database, or theory!
Nature is like a KALIEDOSCOPE - there are infinite number of
dimensions, infinite variety particles of other dimensions but they
all combine into very few primary dimensions and vice-versa.
By combining the energies of millions of people around the world via
internet it is possible to achieve a NEAR PERFECT system (including a
database software system). Individually, the energy of each person
will be minute, but by networking a large number of people, the total
energy will be huge which can be focused on a project to generate a
near perfect system.
The energy is measured in Joules, kiloJoules or kilograms of mass, and
time is measured in seconds or hours. And power is energy divided by
time and is measured in Watts or kiloWatts .
______________________________________________________________________
Energy of each person = y Joules
or in terms of mass
Energy of each person = y grams
The conversion factor between mass and energy is E = m * c * c
where 'c' is the speed of light and 'm' is the mass.
Time = 8 hours (This is constant since each person has only 8 hours a day)
Power = Energy / Time
= (y / (8 * 60 * 60) ) Watts
Total Power of the world = n * (y / (8 * 60 * 60) ) Watts
where n = number of persons working on the project.
______________________________________________________________________
From the above equation it is clear that increasing the 'n' will
greatly improve the quality of product. Greater the 'n' then greater
will be the power (in KiloWatts). You can wonder how much total
energy (in KiloJoules) and total power (in KiloWatts) the global
internet can focus on a system like Linux and PostgreSQL!
It is very clear that internet can network a vast number of people,
which implies internet has a lot of energy and time which can produce
much higher quality software products in much shorter time as compared
to commercial companies. Even very big companies like Microsoft and
IBM cannot overpower and overrule the laws of Physics but will
eventually SURRENDER UNTO laws of science!
Conclusion is - because of laws of science, 'open source code' system
like PostgreSQL, Linux will prevail and will be always much better
than 'closed source code' system and it is possible to prove this
statement scientifically. Man should not waste time creating too many
duplicate software products.
3. What is PostgreSQL ?
PostgreSQL is a free database, complete source code is given to you
and is an Object-Relational Database System targetting on ANSI ISO/SQL
1998, 92 and runs on diverse hardware platforms and Operating systems.
The ultimate objective and the final goal of PostgreSQL is to become
100 % compliant to ANSI/ISO SQL and also to become the number ONE open
generic Database in the world.
PostgreSQL is pronounced as Post-gres-cue-el (Postgres-QL) and not
Postgre-es-cue-el.
Today, PostgreSQL is the most advanced system in the world and it is
surprising that many commercial database systems could not match the
quality, features and capabilities of PostgreSQL !! PostgreSQL is the
joint effort of many nations around the globe and is a project similar
to International Space Station. PostgreSQL will remain the number one
database system for many decades into future since it is an open-
source code system.
The fundamental idea behind PostgreSQL is - once a module of code is
written than you should not waste even a milli-second of your time
trying to re-invent it!!
Informix Universal server (released 1997) is based on earlier version
of PostgreSQL because Informix bought Illustra Inc. and integrated
with Informix. Illustra database was based on Postgres (earlier
version of PostgreSQL).
PostgreSQL is an enhancement of the POSTGRES database management
system, a next-generation DBMS research prototype. While PostgreSQL
retains the powerful data model and rich data types of POSTGRES, it
replaces the PostQuel query language with an extended subset of SQL.
PostgreSQL development is being performed by a team of Internet
developers who all subscribe to the PostgreSQL development mailing
list. The current coordinator is Marc G. Fournier
�
[email protected]
This team is now responsible for all current and future development
of PostgreSQL. Ofcourse, the database customer himself is the
developer of PostgreSQL! The development load is distributed among
a very large number of database end-users on internet.
The authors of PostgreSQL 1.01 were Andrew Yu and Jolly Chen. The
original Postgres code, from which PostgreSQL is derived, was the
effort of many graduate students, undergraduate students, and staff
programmers and working under the direction of Professor Michael
Stonebraker at the University of California, Berkeley.
Millions of PostgreSQL is installed as Database servers, Web database
servers and Application data servers. It is very sophisticated object
relational database system (ORDBMS).
PostgreSQL runs on Solaris, SunOS, HPUX, AIX, Linux, Irix, Digital
Unix, BSDi,NetBSD, FreeBSD, SCO unix, NEXTSTEP, Unixware and all and
every flavor of Unix. Port to Windows NT is done using Cygnus cygwin32
package.
PostgreSQL and related items in this document are subject to the
COPYRIGHT from University of California, Berkeley.
3.1. White Paper
PostgreSQL details in nutshell:
� Title: PostgreSQL SQL RDBMS Database (Object Relational
Database Management System)
� Current Version: 7.0.1
� Age: PostgreSQL is 15 years old. Developed since 1985
� Authors: Developed by millions/universities/companies on
internet for the past 15 YEARS
The white paper on PostgreSQL is at <
http://www.greatbridge.com>.
PostgreSQL is pronounced as Post-gres-cue-el (Postgres-QL) and not
Postgre-es-cue-el.
4. Which one? PostgreSQL or MySQL ?
4.1. PostgreSQL defeated Oracle, IBM DB2, MS SQL server and others!!
PostgreSQL defeated Oracle 8 (and 8i), IBM DB2, MS SQL server, Sybase,
Interbase and MySQL in standard benchmark tests in performance, speed,
scalability and reliability! Read the benchmarks at
<
http://www.aldev.8m.com> or at <
http://aldev.webjump.com>
4.2. MySQL and other duplicate RDBMSes
MySQL is another open-source SQL server, but it does not support
transactions. It is suitable for very small databases and does not
support advanced SQL functionalities. Whereas PostgreSQL is an
enterprise strength database supporting transactions and almost all
SQL constructs. PostgreSQL is much more advanced than commercial
databases like Oracle, Sybase and Informix. PostgreSQL supports very
advanced locking mechanisms and many more advanced features which are
not available in commercial database systems!!
In near future development of MySQL will be dropped, since MySQL is
duplicate product working towards ANSI SQL. We would take the most
advanced and mature open-source SQL server and drop all others as we
do not have lots of time (to deal with multiple RDBMSes)!! In fact,
you do not have time to deal with just one powerful SQL server like
PostgreSQL! And all the MySQL users will be migrated to PostgreSQL.
Also MySQL is a 'quasi-commercial' product unlike PostgreSQL which is
open-source and there is no license fee. There is no need for another
SQL database system as PostgreSQL is already here in this world!!
Duplicate products like MySQL confuse the user base and causes
division of resources. For a "NEAR PERFECT" system there must be only
one system and everybody in the world must work on it!! Duplicate
products cause more harm than good and hence division of resources
must be strongly discouraged. This already happened in case of
commercial database systems like Oracle, Sybase, Informix and MS SQL
server which caused splintering of user base and often they are
incompatible. I want put the source code of SQL server under your
control!!!
You do not need hundreds of database systems, all you need is just one
best database server which happens to be 'PostgreSQL'.
WARNING: It is possible to create infinite number of database systems
for a given specification like ANSI SQL!!
Features which are missing in MySQL and which PostgreSQL supports are
-
� Transactions
� Stored Procedures
� Triggers (update, insert and delete)
� Object oriented databases
� Advanced locking systems, concurrency management under multi-user,
mutli-transactions environment
� Sub-queries
� Server-side cursors
� Query caching
� Locking of databases
� Better table join supports (JOIN, UNION, MINUS, INTERSECT, outer
join)
� And many more advanced features - too numerous to list here.
MySQL is at <
http://www.tcx.se>
4.3. Limitations of MySQL
PostgreSQL should be compared with systems like Oracle, both are
really true ACID compliant robust systems developed over a very long
time. It is very much wrong to compare MySQL with Oracle or MySQL
with PostgreSQL. For more details read Why Not MySQL
<
http://openacs.org/philosophy/why-not-mysql.html>. Hence, it will be
a very serious mistake to replace Oracle with MySQL!! If you want to
replace Oracle then consider PostgreSQL.
5. Where to get it ?
You can buy Redhat Linux CDROM, Debian Linux CDROM or Slackware Linux
CDROM which already contains the PostgreSQL in package form (both
source code and binaries) from :
� Linux System Labs Web site: <
http://www.lsl.com/> (7 U.S.
dollars)
� Cheap Bytes Inc Web site: <
http://www.cheapbytes.com/> (7 U.S.
dollars)
� Debian Main Web site : <
http://www.debian.org/vendors.html>
PostgreSQL organisation is also selling 'PostgreSQL CDROM' which
contains the complete source code and binaries for many Unix operating
systems as well as full documentation.
� PostgreSQL CDROM from main Web site at :
<
http://www.postgresql.org> 30 (U.S. dollars)
Binaries only distribution of PostgreSQL:
� The maintainer of PostgreSQL RPMs is Lamar Owen and is at
[email protected]
� PostgreSQL source RPM and binaries RPM
<
http://www.ramifordistat.net/postgres>
� PostgreSQL source RPM and binaries RPM <
http://www.postgresql.org>
Click on "Latest News" and click on Redhat RPMs.
� PostgreSQL source RPM and binaries RPM
<
http://www.redhat.com/pub/contrib/i386/> and ftp site is at
<
ftp://ftp.redhat.com/pub/contrib/i386/>
� Binaries site for Solaris, HPUX, AIX, IRIX, Linux :
<
ftp://ftp.postgresql.org/pub/bindist>
WWW Web sites:
� Primary Web site: <
http://www.postgresql.org/>
� Secondary Web site: <
http://logical.thought.net/postgres95/>
� <
http://www.itm.tu-clausthal.de/mirrors/postgres95/>
� <
http://s2k-ftp.cs.berkeley.edu:8000/postgres95/>
� <
http://xenium.pdi.net/PostgreSQL/>
� <
http://s2k-ftp.cs.berkeley.edu:8000/postgres95/>
The ftp sites are listed below :-
� Primary FTP: <
ftp://ftp.postgresql.org/pub>
� Secondary FTP: <
ftp://ftp.chicks.net/pub/postgresql>
� <
ftp://ftp.emsi.priv.at/pub/postgres/>
� <
ftp://ftp.itm.tu-clausthal.de/pub/mirrors/postgres95>
� <
ftp://rocker.sch.bme.hu/pub/mirrors/postgreSQL>
� <
ftp://ftp.jaist.ac.jp/pub/dbms/postgres95>
� <
ftp://ftp.luga.or.at/pub/postgres95>
� <
ftp://postgres95.vnet.net:/pub/postgres95>
� <
ftp://ftpza.co.za/mirrors/postgres>
� <
ftp://sunsite.auc.dk/pub/databases/postgresql>
� <
ftp://ftp.task.gda.pl/pub/software/postgresql>
� <
ftp://xenium.pdi.net/pub/PostgreSQL>
PostgreSQL source code is also available at all the mirror sites of
sunsite unc (total of about 1000 sites around the globe). It is inside
the Red Hat Linux distribution in /pub/contrib/i386/postgresql.rpm
file.
� For list of mirror sites go to <
ftp://sunsite.unc.edu>
6. PostgreSQL Quick-Installation Instructions
PostgreSQL is pronounced as Post-gres-cue-el (Postgres-QL) and not
Postgre-es-cue-el.
This chapter will help you to install and run the database very
quickly in less than 5 minutes.
6.1. Install and Test
Quick Steps to Install, Test, Verify and run PostgreSQL Login as root.
______________________________________________________________________
# cd /mnt/cdrom/RedHat/RPMS
# man rpm
# ls postgre*.rpm
# rpm -qpl postgre*.rpm | less (to see list of files)
# rpm -qpi postgre*.rpm (to see info of package)
# cat /etc/passwd | grep postgres
______________________________________________________________________
Note: If you see a 'postgres' user, you may need to backup and clean
up the postgres home directory postgres and delete the unix user
'postgres' or rename the unix user 'postgres' to something like 'post�
gres2'. Install must be "clean slate"
______________________________________________________________________
# rpm -i postgre*.rpm (Must install all packages clients, devel, data
and main for pgaccess to work )
# man chkconfig
# chkconfig --add postgresql (to start pg during booting)
# /etc/rc.d/init.d/postgresql start (to start up postgres)
# man xhost
# xhost + (To give display access for pgaccess)
# su - postgres
bash$ man createdb
bash$ createdb mydatabase
bash$ man psql
bash$ psql mydatabase
..... in psql press up/down arrow keys for history line editing or \s
bash$ export DISPLAY=<hostname>:0.0
bash$ man pgaccess
bash$ pgaccess mydatabase
______________________________________________________________________
Now you can start rapidly BANGING away SQL commands at psql or pgac�
cess.
______________________________________________________________________
bash$ cd /usr/doc/postgresql*
______________________________________________________________________
Here read all the FAQs, User, Programmer, Admin guides and tutorials.
6.2. PostgreSQL RPMs
See also "Installation Steps" from
<
http://www.ramifordistat.net/postgres>
The maintainer of PostgreSQL RPMs is Lamar Owen and is at
[email protected] More details about PostgreSQL is at
<
http://www.postgresql.org>
6.3. Maximum RPM
Familiarize with RedHat RPM package manager to manage the PostgreSQL
installations. Download the 'Maximum RPM' textbook from
<
http://www.RPM.org> look for the filename maximum-rpm.ps.gz And read
it on linux using the gv command -
______________________________________________________________________
# gv maximum-rpm.ps.gz
______________________________________________________________________
There is also rpm2deb which converts the RPM packages to Debian linux
packages.
6.4. Examples RPM
Examples are needed to do testing of various interfaces to PostgreSQL.
Install the postgresql examples directory from -
� Linux cdrom - postgresql-*examples.rpm
� postgresql-*examples.rpm from <
http://www.aldev.8m.com> and mirrors
at webjump <
http://aldev.webjump.com>, angelfire
<
http://www.angelfire.com/nv/aldev>, geocities
<
http://www.geocities.com/alavoor/index.html>, virtualave
<
http://aldev.virtualave.net>, bizland <
http://aldev.bizland.com>,
theglobe <
http://members.theglobe.com/aldev/index.html>, spree
<
http://members.spree.com/technology/aldev>, infoseek
<
http://homepages.infoseek.com/~aldev1/index.html>, bcity
<
http://www3.bcity.com/aldev>, 50megs <
http://aldev.50megs.com>
� PostgreSQL source code tree postgresql*.src.rpm and look for
examples, testing or tutorial directories
6.5. Testing PyGreSQL - Python interface
Install examples package, see ``'' and then do -
______________________________________________________________________
bash$ cd /usr/lib/pgsql/python
bash$ createdb thilo
bash$ psql thilo
thilo=> create table test (aa char(30), bb char(30) );
thilo=> \q
bash$ /usr/bin/python
>>> import _pg
>>> db = _pg.connect('thilo', 'localhost')
>>> db.query("INSERT INTO test VALUES ('ping', 'pong')")
>>> db.query("SELECT * FROM test")
eins|zwei
----+----
ping|pong
(1 row)
>>>CTRL+D
bash$
..... Seems to work - now install it properly
bash$ su - root
# cp /usr/lib/pgsql/python/_pg.so /usr/lib/python1.5/lib-dynload
______________________________________________________________________
6.6. Testing Perl - Perl interface
Install examples package, see ``'' and then do -
______________________________________________________________________
root# chown -R postgres.postgres /var/lib/pgsql/examples
bash$ cd /var/lib/pgsql/examples/perl5
bash$ perl ./example.pl
______________________________________________________________________
Note: If the above command does not work then do this. Gloabl var
@INC should include the Pg.pm module in directory site_perl hence use
-I option below
______________________________________________________________________
bash$ perl -I/usr/lib/perl5/site_perl/5.005/i386-linux-thread ./example.pl
______________________________________________________________________
.... You ran the perl which is accessing PostgreSQL database!!
Read the example.pl file for using perl interface.
6.7. Testing libpq, libpq++ interfaces
Install examples package, see ``'' and then do -
______________________________________________________________________
root# chown -R postgres.postgres /var/lib/pgsql/examples
bash$ cd /var/lib/pgsql/examples/libpq
bash$ gcc testlibpq.c -I/usr/include/pgsql -lpq
bash$ export PATH=$PATH:.
bash$ a.out
bash$ cd /var/lib/pgsql/examples/libpq++
bash$ g++ testlibpq0.cc -I/usr/include/pgsql -I/usr/include/pgsql/libpq++
-lpq++ -lpq -lcrypt
bash$ ./a.out (Note: Ignore Error messages if you get any - as below)
> create table foo (aa int, bb char(4));
No tuples returned...
status = 1
Error returned: fe_setauthsvc: invalid name: , ignoring...
> insert into foo values ('4535', 'vasu');
No tuples returned...
status = 1
Error returned: fe_setauthsvc: invalid name: , ignoring...
> select * from foo;
aa |bb |
-----|-----|
4535 |vasu |
Query returned 1 row.
>
>CTRL+D
bash$
______________________________________________________________________
.... You ran direct C/C++ interfaces to PostgreSQL database!!
6.8. Testing Java interfaces
Install examples package, see ``'' and also install the following -
� Get JDK jdk-*glibc*.rpm from
<
ftp://ftp.redhat.com/pub/contrib/i386> or from
<
http://www.blackdown.org>
� Get postgresql-jdbc-*.rpm <
ftp://ftp.redhat.com/pub/contrib/i386>
___________________________________________________________________
root# chown -R postgres.postgres /var/lib/pgsql/examples
bash$ cd /var/lib/pgsql/examples/jdbc
bash$ echo $CLASSPATH
--> Should show
CLASSPATH=/usr/lib/pgsql/jdbc7.0-1.2.jar:.:/home/java/jdk1.2.2/lib:/usr/lib/pgsql:/usr/lib/pgsql/classes.zip:/usr/lib/pgsql/pg.jar
with proper jdbc*.jar version numbers.
And the directories /usr/lib/pgsql and /usr/libjdk*/lib should contain *.jar files.
bash$ export CLASSPATH=/usr/lib/pgsql/jdbc7.0-1.2.jar:.:/home/java/jdk1.2.2/lib:/usr/lib/pgsql:/usr/lib/pgsql/classes.zip:/usr/lib/pgsql/pg.jar
Edit all psql.java file and comment out the 'package' line.
bash$ javac psql.java
bash$ java psql jdbc:postgresql:template1 postgres < password >
[1] select * from pg_tables;
tablename tableowner hasindexes hasrules
pg_type postgres true false false
pg_attribute postgres true false false
[2]
CTRL+C
bash$
___________________________________________________________________
.... You ran direct Java interfaces to PostgreSQL database!
6.9. Testing ecpg interfaces
Install examples package, see ``'' and then do -
______________________________________________________________________
root# chown -R postgres.postgres /var/lib/pgsql/examples
bash$ cd /var/lib/pgsql/examples/ecpg
bash$ ecpg test1.pgc -I/usr/include/pgsql
bash$ cc test1.c -I/usr/include/pgsql -lecpg -lpq -lcrypt
bash$ createdb mm
bash$ ./a.out
______________________________________________________________________
.... You ran Embedded "C"-SQL to PostgreSQL database!
6.10. Testing SQL examples - User defined types and functions
Install examples package, see ``'' and then do -
______________________________________________________________________
root# chown -R postgres.postgres /var/lib/pgsql/examples
bash$ cd /var/lib/pgsql/examples/sql
Under-development..
______________________________________________________________________
6.11. Testing Tcl/Tk interfaces
Example of Tcl/Tk interfaces is pgaccess program. Read the file
/usr/bin/pgaccess using an editor -
______________________________________________________________________
bash$ view /usr/bin/pgaccess
bash$ export DISPLAY=<hostname of your machine>:0.0
bash$ createdb mydb
bash$ pgaccess mydb
______________________________________________________________________
6.12. Testing ODBC interfaces
1. Get the win32 pgsql odbc driver from
<
http://www.insightdist.com/psqlodbc/>
2. See also /usr/lib/libpsqlodbc.a
6.13. Testing MPSQL Motif-worksheet interfaces
Get the RPMs from <
http://www.mutinybaysoftware.com>
6.14. Verification
To verify the top quality of PostgreSQL, run the Regression test
package :- Login as root -
______________________________________________________________________
# rpm -i postgresql*test.rpm
And see README file or install the source code tree which has regress directory
# rpm -i postgresql*.src.rpm
# cd /usr/src/redhat/SPECS
# more postgresql*.spec (to see what system RPM packages you need to
install)
# rpm -bp postgresql*.spec (.. this will prep the package)
Regression test needs the Makefiles and some header files like *fmgr*.h
which can be built by -
# rpm --short-circuit -bc postgresql*.spec ( .. use short circuit to
bypass!)
Abort the build by CTRL+C, when you see 'make -C common SUBSYS.o'
By this time configure is successful and all makefiles and headers
are created. You do not need to proceed any further
# cd /usr/src/redhat/BUILD
# chown -R postgres postgresql*
# su - postgres
bash$ cd /usr/src/redhat/BUILD/postgresql-6.5.3/src/test/regress
bash$ more README
bash$ make clean; make all runtest
bash$ more regress.out
______________________________________________________________________
6.15. Emergency Bug fixes
Sometimes emergency bug fix patches are released after the GA release
of PostgreSQL. You can apply these optional patches depending upon the
needs of your application. Follow these steps to apply the patches -
Change directory to postgresql source directory
# rpm -i postgresql*.src.rpm
# cd /usr/src/postgresql6.5.3
# man patch
# patch -p0 < patchfile
# make clean
# make
The patch files are located in
� PostgreSQL patches : <
ftp://ftp.postgresql.org/pub/patches>
7. Quick Start Guide
Refer also to ``Quick Installation'' chapter.
7.1. Creating, Dropping, Renaming Database
You can use the user friendly GUI called 'pgaccess' to create and drop
databases, or you can use the command line 'psql' utility.
______________________________________________________________________
If you are logged in as root, switch user to 'postgres' :
# xhost + (To give display access for pgaccess)
# su - postgres
bash$ man createdb
bash$ createdb mydatabase
bash$ man psql
bash$ psql mydatabase
..... in psql press up/down arrow keys for history line editing or \s
bash$ export DISPLAY=<hostname>:0.0
bash$ man pgaccess
bash$ pgaccess mydatabase
______________________________________________________________________
Now you can start rapidly BANGING away SQL commands at psql or pgac�
cess !!
To drop the database do :
______________________________________________________________________
bash$ man dropdb
bash$ man destroydb (for older versions of pgsql)
bash$ dropdb <dbname>
______________________________________________________________________
It is also possible to destroy a database from within an SQL session
by using:
______________________________________________________________________
> drop database <dbname>
______________________________________________________________________
To rename a database see ``Backup and Restore''
7.2. Creating, Dropping users
To create new users, login as unix user 'postgres'. You can use user
friendly GUI tool called 'pgacess' to create, drop users.
______________________________________________________________________
bash$ man pgaccess
bash$ pgaccess <database_name>
______________________________________________________________________
and click on "Users" tab and then click Object|New or Object|Delete
You can also use command line scripts. Use the shell script called
'createuser' which invokes psql
______________________________________________________________________
bash$ man createuser
bash$ createuser <username>
bash$ createuser -h host -p port -i userid <username>
______________________________________________________________________
To drop a postgres user, use shell script 'destroyuser' -
______________________________________________________________________
bash$ man dropuser
bash$ man destroyuser (older versions of pgsql)
bash$ destroyuser
______________________________________________________________________
7.3. Creating, Dropping Groups
Currently, there is no easy interface to set up user groups. You have
to explicitly insert/update the pg_group table. For example:
______________________________________________________________________
bash$ su - postgres
bash$ psql <database_name>
..... in psql press up/down arrow keys for history line editing or \s
psql=> insert into pg_group (groname, grosysid, grolist)
psql=> values ('posthackers', '1234', '{5443, 8261}' );
INSERT 58224
psql=> grant insert on foo to group posthackers;
CHANGE
psql=>
______________________________________________________________________
The fields in pg_group are: groname The group name. This name should
be purely alphanumeric; do not include underscores or other punctua�
tion.
grosysid The group id. This is an int4, and should be unique for each
group.
grolist The list of pg_user IDs that belong in the group. This is an
int4[].
To drop the group:
______________________________________________________________________
bash$ su - postgres
bash$ psql <database_name>
..... in psql press up/down arrow keys for history line editing or \s
psql=> delete from pg_group where groname = 'posthackers';
______________________________________________________________________
7.4. Create, Edit, Drop a table
You can use user friendly GUI tool 'pgaccess' or command line tool
'psql' to create, edit or drop a table in a database.
______________________________________________________________________
bash$ man pgaccess
bash$ pgaccess <database_name>
______________________________________________________________________
Click on Table | New | Design buttons.
______________________________________________________________________
bash$ man psql
bash$ psql <database_name>
..... in psql press up/down arrow keys for history line editing or \s
______________________________________________________________________
At psql prompt, give standard SQL statements like 'create table',
'alter table' or 'drop table' to manipulate the tables.
7.5. Create, Edit, Drop records in a table
You can use user friendly GUI tool 'pgaccess' or command line tool
'psql' to create, edit or drop records in a database table.
______________________________________________________________________
bash$ man pgaccess
bash$ pgaccess <database_name>
______________________________________________________________________
Click on Table | < pick a table > | Open buttons.
______________________________________________________________________
bash$ man psql
bash$ psql <database_name>
..... in psql press up/down arrow keys for history line editing or \s
______________________________________________________________________
At psql prompt, give standard SQL statements like 'insert into
table_name', 'update table_name' or 'delete from table_name' to manip�
ulate the tables.
7.6. Switch active Database
You can use user friendly GUI tool 'pgaccess' or command line tool
'psql' to switch active database.
______________________________________________________________________
bash$ man pgaccess
bash$ pgaccess <database_name>
______________________________________________________________________
Click on Database | Open buttons.
______________________________________________________________________
bash$ man psql
bash$ psql <database_name>
..... in psql press up/down arrow keys for history line editing or \s
psql=> connect <database_name> <user>
______________________________________________________________________
7.7. Backup and Restore database
PostgreSQL provides two utilities to back up your system: pg_dump to
backup individual databases, and pg_dumpall to back up all the
databases in just one step.
______________________________________________________________________
bash$ su - postgres
bash$ man pd_dump
bash$ pd_dump <database_name> > database_name.pgdump
To dump all databases -
bash$ man pg_dumpall
bash$ pg_dumpall -o > db_all.out
To reload (restore) a database dumped with pg_dump:
bash$ cat database_name.pgdump | psql <database_name>
To reload (restore) all databases dumped with pg_dumpall:
bash$ psql -e template1 < db_all.out
______________________________________________________________________
This technique can be used to move databases to new locations, and to
rename existing databases.
WARNING: Every database should be backed up on a regular basis. Since
PostgreSQL manages its own files in the file sysetem, it is not
advisable to rely on system backups of your file system for your
database backups; there is no guarantee that the files will be in an
usable, consistent state after restoration.
BACKUP LARGE DATABASES: Since Postgres allows tables larger than the
maximum file size on your system, it can be problematic to dump the
table to a file, because the resulting file likely will be larger than
the maximum size allowed by your system. As pg_dump writes to stdout,
you can just use standard unix tools to work around this possible
problem - use compressed dumps.
______________________________________________________________________
bash$ pg_dump <database_name> | gzip > filename.dump.gz
Reload with :
bash$ createdb <database_name>
bash$ gunzip -c filename.dump.gz | psql <database_name>
Or
bash$ cat filename.dump.gz | gunzip | psql <database_name>
Use split:
bash$ pg_dump <database_name> | split -b 1m - filename.dump.
Note: There is a dot (.) after filename.dump in the above command!!
You can reload with:
bash$ man createdb
bash$ createdb <database_name>
bash$ cat filename.dump.* | pgsql <database_name>
______________________________________________________________________
Of course, the name of the file (filename) and the content of the
pg_dump output need not match the name of the database. Also, the
restored database can have an arbitrary new name, so this mechanism is
also suitable for renaming databases.
Backup LARGE Objects: Large objects are not handled by pg_dump. The
directory contrib/pg_dumplo of the Postgres source tree contains a
program that can do that.
FILESYSTEM BACKUP : You can use the linux OS tools and commands to
backup the entire database. But you must completely shutdown the
postgresql database server before doing backup or restore with this
method. The filesystem backup or restore may be 2 to 3 times faster
than the pg_dump command, but only disadvantage is that you must
completely shutdown the database server. It is very highly
recommended that you use backup and restore tools like Arkeia, Bru
which are given in Mic-Lin analogy list sub-heading "Backup and
Restore Utility" at <
http://aldev.8m.com> and mirror sites are at
webjump <
http://aldev.webjump.com>, angelfire
<
http://www.angelfire.com/nv/aldev>, geocities
<
http://www.geocities.com/alavoor/index.html>, virtualnet
<
http://aldev.virtualave.net>, bizland <
http://aldev.bizland.com>,
theglobe <
http://members.theglobe.com/aldev/index.html>, spree
<
http://members.spree.com/technology/aldev>, infoseek
<
http://homepages.infoseek.com/~aldev1/index.html>, bcity
<
http://www3.bcity.com/aldev>, 50megs <
http://aldev.50megs.com> .The
OS commands to use are -
______________________________________________________________________
bash$ man tar
bash$ tar -cvf backup.tar /usr/local/pgsql/data
or using compression
bash$ tar -zcvf backup.tgz /usr/local/pgsql/data
______________________________________________________________________
INCREMENTAL BACKUP : This is in todo list and will appear in future
release of PostgreSQL.
7.8. Security of database
See the chapter on ``PostgreSQL Security''.
7.9. Online help
It is very important that you should know how to use online help
facilities of PostgreSQL, since it will save you lot of time and
provides very quick access to information.
See the online man pages on various commands like createdb,
createuser, etc..
______________________________________________________________________
bash$ man createdb
______________________________________________________________________
See also online help of psql, by typing \h at psql prompt
______________________________________________________________________
bash$ psql mydatabase
psql> \h
Tip: In psql press up/down arrow keys for history line editing or \s
______________________________________________________________________
7.10. Creating Triggers and Stored Procedures
To create triggers or stored procedures, First run 'createlang' script
to install 'plpgsql' in the particular database you are using. If you
want by default then install it in 'template1' and subsequent created
databases will be clones of template1. See 'createlang' web page in
User guide at /usr/doc/postgresql-7.0.2/user/index.html.
______________________________________________________________________
bash$ man createlang
bash$ createdb mydb
bash$ export PGLIB=/usr/lib/pgsql
bash$ createlang plpgsql mydb
bash$ createlang plpgsql template1
______________________________________________________________________
See also the trigger, stored procedures examples in ``''. One sample
code from examples RPM:
______________________________________________________________________
create function tg_pfield_au() returns opaque as '
begin
if new.name != old.name then
update PSlot set pfname = new.name where pfname = old.name;
end if;
return new;
end;
create trigger tg_pfield_au after update
on PField for each row execute procedure tg_pfield_au();
______________________________________________________________________
Another trigger example sample code:
______________________________________________________________________
create trigger check_fkeys_pkey_exist
before insert or update on fkeys
for each row
execute procedure
check_primary_key ('fkey1', 'fkey2', 'pkeys', 'pkey1', 'pkey2');
______________________________________________________________________
You must also install the TEST package - postgresql-test-7.0.2-2.rpm
and read the example sql scripts at - /usr/lib/pgsql/test/regress/sql
To see the list of triggers in database do -
______________________________________________________________________
bash$ psql mydb
psql=> \?
psql=> \dS
psql=> \d pg_trigger
psql=> select tgname from pg_trigger order by tgname;
______________________________________________________________________
To see the list of functions and stored procedures in database do -
______________________________________________________________________
bash$ psql mydb
psql=> \?
psql=> \dS
psql=> \d pg_proc
psql=> select proname, prosrc from pg_proc order by proname;
psql=> \df
______________________________________________________________________
7.11. PostgreSQL Documentation
More questions, read the fine manuals of PostgreSQL which are very
extensive. PostgreSQL documentation is distributed with package. See
the other manuals. The release docs are at
<
http://www.postgresql.org/users-lounge/docs>.
8. Performance Tuning of PostgreSQL server
Generally database server is standalone box connected to network.
Since database server is the only unix process which runs on the CPU,
you can do several optimizations to speed up the server.
8.1. OS Tuning for Database server
To get more bang for a given CPU processing power, do the following:-
� Recompile linux kernel to make it small and lean. Remove items
which are not used. See kernel howto at
<
http://www.linuxdoc.org/HOWTO/Kernel-HOWTO.html>
� Turn off unneccessary unix processes - on linux/unix systems run
chkconfig
___________________________________________________________________
bash$ su - root
bash# man chkconfig
bash# chkconfig --help
bash# chkconfig --list | grep on | less
From the above list, turn off the processes you do not want to start automatically -
bash# chkconfig --level 0123456 <service name> off
Next time when the machine is booted these services will not be started.
Now, shutdown the services manually which you just turning off.
bash# cd /etc/rc.d/init.d
bash# ./<service name> stop
___________________________________________________________________
� Do not run any other application processes which are unnecessary.
� Do not leave X-Window running unattended. Because X-window
processes consume memory, CPU load and can be a serious security
hole from outside attacks. The X-window managers generally used
are KDE, GNOME, CDE, XDM and others. You must exit the X-window
immediately after using and most of the time you should see command
line console login prompt on the database server machine.
8.2. Tuning Database server process
General tuning tips:
� Indices can speed up queries. The explain command allows you to see
how PostgreSQL is interpreting your query, and which indices are
being used.
� Use the cluster command to group data in base tables to match an
index. See the man cluster(1) manual page for more details.
� If you are doing a lot of inserts, consider doing them in a large
batch using the copy command. This is much faster than individual
inserts.
� Statements not in a begin work/commit transaction block are
considered to be in their own transaction. Consider performing
several statements in a single transaction block. This reduces the
transaction overhead. Also consider dropping and recreating indices
when making large data changes.
� It is suggested that you purchase the "Performance Tuning guide"
and tuning support from PostgreSQL Corp.
<
http://www.postgresql.org>.
Specialized tuning tips:
� Internal tuning of PostgreSQL is a complex topic. You need a sound
knowledge of source code and internals of postgresql. It is
strongly recommended that only professionals attempt specialized
tuning tips given below:
� You can disable fsync() by starting the postmaster with a -o -F
option. This will prevent fsync() from flushing to disk after
every transaction. But there is risk of losing data due to
power/media failure. You can reduce the risk of losing data due to
power failure by having the APC UPS
<
http://apc.com/products/ups.cfm> (Uninterrupted Power Supply) and
media failures by disk RAID systems (Antares-Sparc-Raid
<
http://www.linuxdoc.org/HOWTO/Antares-RAID-sparcLinux-
HOWTO/index.html> system, Software-Raid
<
http://www.linuxdoc.org/HOWTO/Software-RAID-HOWTO.html> system,
Old-Software-Raid <
http://www.linuxdoc.org/HOWTO/Software-
RAID-0.4x-HOWTO.html> system, Root-Raid
<
http://www.linuxdoc.org/HOWTO/Root-RAID-HOWTO.html> system, Boot-
Root-Raid <
http://www.linuxdoc.org/HOWTO/Boot+Root+Raid+LILO.html>
system) to gaurd against media failures.
� Use the postmaster -B option to increase the number of shared
memory buffers used by the back-end processes. If you make this
parameter too high, the postmaster may not start up because you've
exceeded your kernel's limit on shared memory space. Each buffer is
8K and the default is 64 buffers.
� Use the back-end -S option to increase the maximum amount of memory
used by each backend process for temporary sorts. The -S value is
measured in kilobytes, and the default is 512 (i.e., 512K). It is
unwise to make this value too large, or you may run out of memory
when query invokes several concurrent sorts.
9. PostgreSQL Supports Extremely Large Databases greater than 200 Gig
PostgreSQL is already used by many companies supporting large
databases. The following techniques are suggested :
9.1. CPU types - 32-bit or 64-bit
Performance of 32-bit cpu machines will decline rapidly when the
database size exceeds 5 GigaByte. You can run 30 gig database on
32-bit cpu but the performance will be degraded. Machines with 32-bit
cpu imposes a limitation of 2 GB on RAM, 2 GB on file system sizes and
other limitations on the operating system. Use the special filesystems
for linux made by SGI, IBM or HP or ext3-fs to support file-sizes
greater than 2 GB on 32-bit linux machines.
For extremely large databases, it is strongly advised to use 64-bit
machines like Digital Alpha cpu, Sun Ultra-sparc 64-bit cpu, Silicon
graphics 64-bit cpu, Intel Merced IA-64 cpu, HPUX 64bit machines or
IBM 64-bit machines. Compile PostgreSQL under 64-bit cpu and it can
support huge databases and large queries. Performance of PostgreSQL
for queries on large tables and databases will be several times faster
than PostgreSQL on 32-bit cpu machines. Advantage of 64-bit machines
are that you get very large memory addressing space and the operating
system can support very large file-systems, provide better performance
with large databases, support much larger memory (RAM), have more
capabilities etc..
9.2. Multiple CPUs
For large databases it is recommended that you use SMP boxes which
have 4, 16 or 32 CPUs. Alternatively, you can use 4 or 5 single CPU
boxes and you can partition the database into 4 or 5 seperate
databases and each database running on a seperate box. Each CPU will
be connected with fast NIC (100MBits) ethernet card. For example - if
you have 200 tables in a database, you can distribute 200 tables to 4
database each having 50 tables. In this way, you are distributing the
load evenly among 4 seperate machines. This is a cheaper alternative
to 4-way CPU box. You would use NFS mounts in LAN, to accomplish this
task. And each CPU "can see" all the databases i.e all the 200 tables.
In future PostgreSQL may provide support for 'Queries across multiple
databases' (already in the TODO list), which may appear in upcoming
version 7.1. For example, queries across multiple databases using
aliases a, b for table names can be like -
______________________________________________________________________
select a.col1, a.col2, b.col4, b.col7
from
database1.my_tablea a, database2.my_tableb b
where
a.col1 = b.col3 and
a.col4 = b.col9;
update my_tablea
set
col1 = b.col2
from
database1.my_tablea a, database2.my_tableb b
where
a.col4 = b.col9;
______________________________________________________________________
9.3. Replication Server
Replication server for large enterprises/businesses is available at
<
http://www.erserver.com> and from <
http://www.pgsql.com>. The
support is sold ($$$$s) commercially by PostgreSQL Inc. You use
replication server to provide redundancy and high availability.
Replication server is a complex, sophisticated product.
10. How can I trust PostgreSQL ? Regression Test Package builds cus�
tomer confidence
Thanks to "Laws of Physics", it is possible to SCIENTIFICALLY verify
whether PostgreSQL is working as per ISO/ANSI SQL specifications. To
validate PostgreSQL, regression test package (src/test/regress) is
included in the distribution. Regression test package will verify the
standard SQL operations as well as the extensibility capabilities of
PostgreSQL. The test package already contains hundreds of SQL test
programs.
You should use the computer's high-speed power to validate the
PostgreSQL, instead of using human brain power. Computers can carry
out software regression tests millions or even billions of times
faster than humans can. Modern computers can run billions of SQL
tests in a very short time. In the near future the speed of computer
will be several zillion times faster than human brain! Hence, it
makes sense to use the power of computer to validate the software.
You can add more tests just in case you need to, and can upload to the
primary PostgreSQL web site if you feel that it will be useful to
others on internet. Regression test package helps build customer
confidence and trust in PostgreSQL and facilitates rapid deployment of
PostgreSQL on production systems.
Regression test package can be taken as a "VERY SOLID" technical
document mutually agreed upon between the developers and end-users.
PostgreSQL developers extensively use the regression test package
during development period and also before releasing the software to
public to ensure good quality.
Capablilities of PostgreSQL are directly reflected by the regression
test package. If a functionality, syntax or feature exists in the
regression test package then it is supported, and all others which are
NOT listed in the package MAY not be supported by PostgreSQL!! You may
need to verify those and add it to regression test package.
11. Security of Database
Database security is addressed at several levels:
� Database file protection. All files stored within the database are
protected from reading by any account other than the postgres
superuser account
� Connections from a client to the database server are, by default,
allowed only via an local UNIX socket, not via TCP/IP sockets. The
back-end must be started with the -i option to allow nonlocal
clients to connect.
� Client connections can be restricted by IP address and/or username
via the pg_hba.conf file in $PG_DATA.
� Client connections may be authenticated via other external
packages.
� Each user in Postgres is assigned an username and (optionally) a
password. By default, users do not have write access to databases
they did not create.
� Users may be assigned to groups, and table access may be restricted
based on group priveleges.
11.1. User Authentication
Authentication is the process by which the backend server and
postmaster ensure that the user requesting access to data is in fact
who he/she claims to be. All users who invoke Postgres are checked
against the contents of the pg_user class to ensure that they are
authorized to do so. However, verification of the user's actual
identity is performed in a variety of ways:
� From the user shell: A backend server started from an user shell
notes the user's (effective) user-id before performing a setuid to
the user-id of user postgres. The effective user-id is used as the
basis for access control checks. No other authentication is
conducted.
� From the network: If the Postgres system is built as distributed,
access to the Internet TCP port of the postmaster process is
available to anyone. The DBA configures the pg_hba.conf file in the
$PGDATA directory to specify what authentication system is to be
used according to the host making the connection and which database
it is connecting to. See pg_hba.conf(5) (man 5 pg_hba.conf) for a
description of the authentication systems available. Of course,
host-based authentication is not fool-proof in Unix, either. It is
possible for determined intruders to also masquerade the
origination host. Those security issues are beyond the scope of
Postgres.
11.2. Host-Based Access Control
Host-based access control is the name for the basic controls
PostgreSQL exercises on what clients are allowed to access a database
and how the users on those clients must authenticate themselves. Each
database system contains a file named pg_hba.conf, in its $PGDATA
directory, which controls who can connect to each database. Every
client accessing a database must be covered by one of the entries in
pg_hba.conf. Otherwise all attempted connections from that client will
be rejected with a "User authentication failed" error message.
See online man page of pg_hba.conf(5) (man 5 pg_hba.conf).
The general format of the pg_hba.conf file is of a set of records, one
per line. Blank lines and lines beginning with a hash character ("#")
are ignored. A record is made up of a number of fields which are
separated by spaces and/or tabs.
Connections from clients can be made using Unix domain sockets or
Internet domain sockets (ie. TCP/IP). Connections made using Unix
domain sockets are controlled using records of the following format:
______________________________________________________________________
local database authentication method
______________________________________________________________________
where
database specifies the database that this record applies to. The value
all specifies that it applies to all databases.
authentication method specifies the method an user must use to
authenticate themselves when connecting to that database using Unix
domain sockets. The different methods are described below.
Connections made using Internet domain sockets are controlled using
records of the following format.
______________________________________________________________________
host database TCP/IP-address TCP/IP-mask authentication method
______________________________________________________________________
The TCP/IP address is logically and'ed to both the specified TCP/IP
mask and the TCP/IP address of the connecting client. If the two
resulting values are equal then the record is used for this
connection. If a connection matches more than one record then the
earliest one in the file is used. Both the TCP/IP address and the
TCP/IP mask are specified in dotted decimal notation. If a connection
fails to match any record then the reject authentication method is
applied (see ``Authentication Methods'').
11.3. Authentication Methods
The following authentication methods are supported for both Unix and
TCP/IP domain sockets:
� trust The connection is allowed unconditionally.
� reject The connection is rejected unconditionally.
� crypt The client is asked for a password for the user. This is sent
encrypted (using crypt(3)) and compared against the password held
in the pg_shadow table. If the passwords match, the connection is
allowed.
� password The client is asked for a password for the user. This is
sent in clear and compared against the password held in the
pg_shadow table. If the passwords match, the connection is allowed.
An optional password file may be specified after the password
keyword which is used to match the supplied password rather than
the pg_shadow table. See pg_passwd.
The following authentication methods are supported for TCP/IP domain
sockets only:
� krb4 Kerberos V4 is used to authenticate the user.
� krb5 Kerberos V5 is used to authenticate the user.
� ident The ident server on the client is used to authenticate the
user (RFC 1413). An optional map name may be specified after the
ident keyword which allows ident user names to be mapped onto
Postgres user names. Maps are held in the file
$PGDATA/pg_ident.conf.
Here are some examples:
______________________________________________________________________
# Trust any connection via Unix domain sockets.
local trust
# Trust any connection via TCP/IP from this machine.
host all 127.0.0.1 255.255.255.255 trust
# We don't like this machine.
host all 192.168.0.10 255.255.255.0 reject
# This machine can't encrypt so we ask for passwords in clear.
host all 192.168.0.3 255.255.255.0 password
# The rest of this group of machines should provide encrypted passwords.
host all 192.168.0.0 255.255.255.0 crypt
______________________________________________________________________
11.4. Access Control
Postgres provides mechanisms to allow users to limit the access to
their data that is provided to other users.
� Database superusers Database super-users (i.e., users who have
pg_user.usesuper set) silently bypass all of the access controls
described below with two exceptions: manual system catalog updates
are not permitted if the user does not have pg_user.usecatupd set,
and destruction of system catalogs (or modification of their
schemas) is never allowed.
� Access Privilege The use of access privilege to limit reading,
writing and setting of rules on classes is covered in SQL
grant/revoke(l).
� Class removal and schema modification Commands that destroy or
modify the structure of an existing class, such as alter, drop
table, and drop index, only operate for the owner of the class. As
mentioned above, these operations are never permitted on system
catalogs.
11.5. Secure TCP/IP Connection via SSH
You can use ssh to encrypt the network connection between clients and
a Postgres server. Done properly, this should lead to an adequately
secure network connection.
The documentation for ssh provides most of the information to get
started. Please refer to <
http://www.heimhardt.de/htdocs/ssh.html> for
better insight. A step-by-step explanation can be done in just two
steps.
Running a secure tunnel via ssh: A step-by-step explanation can be
done in just two steps.
� Establish a tunnel to the back-end machine, like this:
___________________________________________________________________
ssh -L 3333:wit.mcs.anl.gov:5432
[email protected]
___________________________________________________________________
� The first number in the -L argument, 3333, is the port number of
your end of the tunnel. The second number, 5432, is the remote end
of the tunnel -- the port number your backend is using. The name
or the address in between the port numbers belongs to the server
machine, as does the last argument to ssh that also includes the
optional user name. Without the user name, ssh will try the name
you are currently logged on as on the client machine. You can use
any user name the server machine will accept, not necessarily those
related to postgres.
� Now that you have a running ssh session, you can connect a postgres
client to your local host at the port number you specified in the
previous step. If it's psql, you will need another shell because
the shell session you used in step 1 is now occupied with ssh.
___________________________________________________________________
psql -h localhost -p 3333 -d mpw
___________________________________________________________________
� Note that you have to specify the -h argument to cause your client
to use the TCP socket instead of the Unix socket. You can omit the
port argument if you chose 5432 as your end of the tunnel.
11.6. Kerberos Authentication
Kerberos is an industry-standard secure authentication system suitable
for distributed computing over a public network.
Availability: The Kerberos authentication system is not distributed
with Postgres. Versions of Kerberos are typically available as
optional software from operating system vendors. In addition, a source
code distribution may be obtained through MIT Project Athena.
______________________________________________________________________
Note: You may wish to obtain the MIT version even if your vendor provides a version, since
some vendor ports have been deliberately crippled or rendered non-interoperable with the MIT
version.
______________________________________________________________________
Inquiries regarding your Kerberos should be directed to your vendor or
MIT Project Athena. Note that FAQLs (Frequently-Asked Questions Lists)
are periodically posted to the Kerberos mailing list (send mail to
subscribe), and USENET news group.
Installation: Installation of Kerberos itself is covered in detail in
the Kerberos Installation Notes . Make sure that the server key file
(the srvtab or keytab) is somehow readable by the Postgres account.
Postgres and its clients can be compiled to use either Version 4 or
Version 5 of the MIT Kerberos protocols by setting the KRBVERS
variable in the file src/Makefile.global to the appropriate value. You
can also change the location where Postgres expects to find the
associated libraries, header files and its own server key file. After
compilation is complete, Postgres must be registered as a Kerberos
service. See the Kerberos Operations Notes and related manual pages
for more details on registering services.
Operation: After initial installation, Postgres should operate in all
ways as a normal Kerberos service. For details on the use of
authentication, see the PostgreSQL User's Guide reference sections for
postmaster and psql.
In the Kerberos Version 5 hooks, the following assumptions are made
about user and service naming(also, see Table below):
� User principal names (anames) are assumed to contain the actual
Unix/Postgres user name in the first component.
� The Postgres service is assumed to be have two components, the
service name and a hostname, canonicalized as in Version 4 (i.e.,
with all domain suffixes removed).
______________________________________________________________________
Table: Kerberos Parameter Examples
------------------------------------------------------
Parameter Example
------------------------------------------------------
user
[email protected]
user aoki/
[email protected]
host postgres_dbms/
[email protected]
------------------------------------------------------
______________________________________________________________________
12. GUI FrontEnd Tool for PostgreSQL (Graphical User Interface)
Web browser will be the most popular GUI front-end in the future. It
is recommended that you migrate all of your "legacy" Windows 95/NT
applications to Web-based application.
You should use Web-Application Servers like ``'' (Java based) or ``''
(Python based) or ``''.
Best web-scripting (and compiling) language is ``PHP+Zend compiler''
PHP is extremely powerful as it combines the power of Perl, Java, C++,
Javascript into one single language and it runs on all OSes - unixes
and Windows NT/95.
The best tools in the order of preference are -
� Enhydra at ``'' plus Borland Java JBuilder for Linux
<
http://www.inprise.com>
� Zope at ``''
� OpenACS at ``''
� PHP script and Zend compiler at ``PHP+Zend compiler''
� X-Designer supports C++, Java and MFC <
http://www.ist.co.uk/xd>
� Qt for Windows95 and Unix at <
http://www.troll.no> and
<
ftp://ftp.troll.no>
� Code Crusader is on linux cdrom, freeware based on MetroWorks Code
Warrior
<
http://www.kaze.stetson.edu/cdevel/code_crusader/about.html>
� Code Warrior from MetroWorks <
http://www.metrowerks.com>
� GNU Prof C++ IDE from (Redhat) <
http://www.redhat.com> Cygnus
<
http://www.cygnus.com>
� Borland C++ Builder for Linux <
http://www.inprise.com>
� Borland Java JBuilder for Linux <
http://www.inprise.com>
Language choices in the order of preference are -
1. Java but its programs run very slow and has license fees. C++ is 5
times faster than Java!!
2. Python (Powerful object oriented scripting language).
3. PHP Web server scripting, HTML, DHTML with Javascrpt client
scripting and Java-Applets.
4. Perl scripting language using Perl-Qt or Perl-Tk ``''
5. Omnipresent and Omnipotent language C++ (GNU g++):
� Fast CGI(written in GNU C++) with Javascript/Java-Applets as Web-
GUI-frontend.
� GNU C++ and QtEZ or QT
� GNU C++ with Lesstiff or Motif.
There are other tools available - PostgreSQL has Tcl/Tk interface
library in the distribution called 'pgTcl'. There is an IDE
(integrated development environment) for Tcl/Tk called SpecTcl.
� Lesstiff Motif tool
<
ftp://ftp.redhat.com/pub/contrib/i386/lesstiff*.rpm>
� Vibe Java/C++ is at <
http://www.LinuxMall.com/products/00487.html>
� JccWarrior <
ftp://ftp.redhat.com/pub/contrib/i386/jcc*.rpm>
� Tcl/Tk <
http://www.scriptics.com>
� Object oriented extension of Tcl called INCR at
<
http://www.tcltk.com>
� Visual TCL site <
http://www.neuron.com>
� Visual TCL Redhat rpm at
<
ftp://ftp.redhat.com/pub/contrib/i386/visualtcl*.rpm>
� <
http://sunscript.sun.com/>
� <
http://sunscript.sun.com/TclTkCore/>
� <
ftp://ftp.sunlabs.com/pub/tcl/tcl8.0a2.tar.Z>
� Java FreeBuilder <
ftp://ftp.redhat.com/pub/contrib/i386/free*.rpm>
� SpecTCL <
ftp://ftp.redhat.com/pub/contrib/i386/spec*.rpm>
� Java RAD Tool for PostgreSQL Kanchenjunga
<
http://www.man.ac.uk/~whaley/kj/kanch.html>
� Applixware Tool <
http://www.redhat.com>
� XWPE X Windows Programming Environment
<
http://www.identicalsoftware.com/xwpe/> or at
<
http://www.rpi.edu/~payned/xwpe/>
<
ftp://ftp.redhat.com/pub/contrib/i386/xwpe*.rpm>
� XWB X Windows Work Bench
<
ftp://ftp.redhat.com/pub/contrib/i386/xwb*.rpm>
� NEdit <
ftp://ftp.redhat.com/pub/contrib/i386/nedit*.rpm>
You can also use Borland C++ Builder, Delphi, Borland JBuilder,
PowerBuilder on Windows95 connecting to PostgreSQL on unix box
through ODBC/JDBC drivers.
13. Interface Drivers for PostgreSQL
13.1. ODBC Drivers for PostgreSQL
ODBC stands for 'Open DataBase Connectivity' established by Microsoft,
is a popular standard for accessing information from various databases
from different vendors. Applications written using the ODBC drivers
are guaranteed to work with various databases like PostgreSQL, Oracle,
Sybase, Informix etc..
� PostODBC <
http://www.insightdist.com/psqlodbc> is already included
in the distribution. See main web site
<
http://www.postgresql.org>. It is included on the PostgreSQL
CDROM.
� Open source code ODBC project is at <
http://www.iodbc.org>
� <
http://www.openlinksw.com> Open Link Software Corporation is
selling ODBC for PostgreSQL and other databases. Open Link also is
giving away free ODBC (limited seats) check them out.
� Insight ODBC for PostgreSQL <
http://www.insightdist.com/psqlodbc>
This is the official PostODBC site.
� FreeODBC package <
http://www.ids.net/~bjepson/freeODBC/> This is a
free of cost version of ODBC.
� ODBC 32 Explorer for PostgreSQL <
http://members.nbci.com/anhr>
13.2. UDBC Drivers for PostgreSQL
UDBC is a static version of ODBC independent of driver managers and
DLL support, used to embed database connectivity support directly into
applications.
� <
http://www.openlinksw.com> Open Link Software Corporation is
selling UDBC for PostgreSQL and other databases. Open Link also is
giving away free UDBC (limited seats) check them out.
13.3. JDBC Drivers for PostgreSQL
JDBC stands for 'Java DataBase Connectivity'. Java is a platform
independent programming language developed by Sun Microsystems. Java
programmers are encouraged to write database applications using the
JDBC to facilitate portability across databases like PostgreSQL,
Oracle, informix, etc. If you write Java applications you can get JDBC
drivers for PostgreSQL from the following sites:
JDBC driver is already included in the PostgreSQL distribution in
postgresql-jdbc*.rpm.
� <
http://www.demon.co.uk/finder/postgres/index.html> Sun's Java
connectivity to PostgreSQL
� <
ftp://ftp.ai.mit.edu/people/rst/rst-jdbc.tar.gz>
� <
http://www.openlinksw.com> Open Link Software Corporation is
selling JDBC for PostgreSQL and other databases. Open Link also is
giving away free JDBC (limited seats) check them out.
� JDBC UK site <
http://www.retep.org.uk/postgres>
� JDBC FAQ site <
http://eagle.eku.edu/tools/jdbc/faq.html>
The JDBC home, guide and FAQ are located at -
� JDBC HOME <
http://splash.javasoft.com/jdbc>
� JDBC guide
<
http://www.javasoft.com/products/jdk/1.1/docs/guide/jdbc>
� JDBC FAQ <
http://javanese.yoyoweb.com/JDBC/FAQ.txt>
See the section - ``Testing Java PostgreSQL interface''
13.4. Java for PostgreSQL
Java programmers can find these for PostgreSQL very useful.
� <
ftp://ftp.redhat.com/pub/contrib/i386> and see postgresql-
jdbc-*.rpm
� <
http://www.blackdown.org>
See the section - ``Testing Java PostgreSQL interface''
14. Perl Database Interface (DBI) Driver for PostgreSQL
14.1. Perl interface for PostgreSQL
PERL is an acronym for 'Practical Extraction and Report Language'.
Perl is available on each and every operating system and hardware
platform in the world. You can use Perl on Windows95/NT, Apple
Macintosh iMac, all flavors of Unix (Solaris, HPUX, AIX, Linux, Irix,
SCO etc..), mainframe MVS, desktop OS/2, OS/400, Amdahl UTS and many
others. Perl runs EVEN on many unpopular or generally-unknown
operating systems and hardware!! So do not be surprised if you see
perl running on a very rarely used operating system. You can imagine
the vast extent of the user base and developer base of Perl. Perl
language has a very long life just like "C" language, and Perl will be
in use for thousands of years in the future! Perl runs 10 times faster
than Java and sometimes faster than even "C". Java is a very complex
system with virtual machine and interpreter which makes it extremely
slow, unstable and unreliable. Perl is very simple, fast and object
oriented.
Perl interface for PostgreSQL is included in the distribution of
PostgreSQL. Check in src/pgsql_perl5 directory.
� Pgsql_perl5 contact Email:
[email protected]
� Perl Home page : <
http://www.perl.com/perl/index.html>
� Perl tutorial, look for Tutorial title at :
<
http://reference.perl.com/>
� Perl FAQ is at :
<
http://www.yahoo.com/Computers_and_Internet/Programming_Languages/Perl/>
� First get Mother of all Perl Modules from
<
http://www.perl.com/CPAN/modules/by-module/CPAN> and type
'/usr/bin/cpan', 'man CPAN', see thousands of modules
<
http://www.perl.com/CPAN-local/modules/by-module>.
� Perl GUI User Interfaces Perl-Qt rpm :
<
ftp://ftp.redhat.com/pub/contrib/i386> and look for
PerlQt-1.06-1.i386.rpm
� Perl GUI User Interfaces Perl-Qt :
<
http://www.accessone.com/~jql/perlqt.html>
� Perl GUI User Interfaces Perl-XForms :
<
ftp://ftp.redhat.com/pub/contrib/i386> and look for
Xforms4Perl-0.8.4-1.i386.rpm
� Perl GUI User Interfaces Perl-Tk :
<
ftp://ftp.redhat.com/pub/contrib/i386>
� Perl GUI kits : <
http://reference.perl.com/query.cgi?ui>
� Perl Database Interfaces :
<
http://reference.perl.com/query.cgi?database>
� Perl to "C" translator : <
http://www.perl.com/CPAN-
local/modules/by-module/B/> and look for Compiler-a3.tar.gz
� Compile Perl to to executable. Perl2Exe is a command line utility
for converting perl scripts to executable files
<
http://www.indigostar.com/perl2exe.htm>
� Bourne shell to Perl translator :
<
http://www.perl.com/CPAN/authors/id/MERLYN/sh2perl-0.02.tar.gz>
� awk to Perl a2p and sed to Perl s2p is included with the PERl
distribution.
� See also the newsgroups for PERL at comp.lang.perl.*
14.2. Perl Database Interface DBI
14.2.1. WHAT IS DBI ?
The Perl Database Interface (DBI) is a database access Application
Programming Interface (API) for the Perl Language. The Perl DBI API
specification defines a set of functions, variables and conventions
that provide a consistent database interface independent of the actual
database being used. The Database Drivers (Perl DBI) initiative has
standardized the interface to a number of commercial database engines,
so that you can move from, say, Oracle to PostgreSQL with a minimum of
effort.
14.2.2. DBD driver for PostgreSQL
Before you install DBD PostgreSQL (Driver) you must install DBI. Get
DBI driver from
� First get Mother of all Perl Modules from
<
http://www.perl.com/CPAN/modules/by-module/CPAN> and type
'/usr/bin/cpan', 'man CPAN', see thousands of modules
<
http://www.perl.com/CPAN-local/modules/by-module>.
� DBI Modules <
http://www.perl.com/CPAN-local/modules/by-
module/DBI>.
� DBI Modules <
http://www.symbolstone.org/technology/perl/DBI>
� DBI FAQ
<
http://www.symbolstone.org/technology/perl/DBI/doc/faq.html>
� References for Perl DBI
<
http://www.symbolstone.org/technology/perl/DBI>
� DBI Mailing Lists <
http://www.fugue.com/dbi>
� Perl Database references
<
http://www.perl.com/reference/query.cgi?section=database>
� Download DBI rpm (Caution: may be old version)
<
http://rpmfind.net/linux/rpm2html/search.php?query=DBI>
Get DBD-Pg from below
� First get Mother of all Perl Modules from
<
http://www.perl.com/CPAN/modules/by-module/CPAN> and type
'/usr/bin/cpan', 'man CPAN', see thousands of modules
<
http://www.perl.com/CPAN-local/modules/by-module>.
� DBD Modules <
http://www.perl.com/CPAN-local/modules/by-
module/DBD>. and look for DBD-pg files or at DBD
<
http://www.perl.com/CPAN/modules/by-module/DBD>.
� Comprehensive Perl Archive Network CPAN <
http://www.perl.com/CPAN>
Go here select 'Database' (located above Search box) and click on
'Go' button.
� Pre-compiled package for Windows NT/2000 is available at
<
http://www.edmund-mergl.de/export/DBD-Pg.zip>
� Download DBD rpm (Caution: may be old version)
<
http://rpmfind.net/linux/rpm2html/search.php?query=DBD>
� Perl Modules (thousands of them) <
http://www.perl.com/CPAN-
local/modules/by-module>.
14.2.3. Technical support for DBI
� Send comments and bug-reports to and include the output of perl -v,
and perl -V, the version of PostgreSQL, the version of DBD-Pg, and
the version of DBI in your bug-report.
[email protected]
14.2.4. DBI Documents
There are a few information sources on DBI.
POD documentation: PODs are chunks of documentation usually embedded
within perl programs that document the code ``in place'', providing an
useful resource for programmers and users of modules. POD for DBI and
drivers is beginning to become more commonplace, and documentation for
these modules can be read with the following commands.
______________________________________________________________________
The POD for the DBI Specification can be read with the command
$ perldoc DBI
Users of the Oraperl emulation layer bundled with DBD::Oracle, may
read up on how to program with the Oraperl interface by typing:
$ perldoc Oraperl
Users of the DBD::mSQL module may read about some of the private
functions and quirks of that driver by typing:
$ perldoc DBD::mSQL
The Frequently Asked Questions is also available as
POD documentation. Read this by typing:
$ perldoc DBI::FAQ
POD in general - Information on writing POD, and on the philosophy of POD in
general, can be read by typing:
$ perldoc perlpod
______________________________________________________________________
Users with the Tk module installed may be interested to learn there is
a Tk-based POD reader available called tkpod, which formats POD in a
convenient and readable way.
See also -
� Information from DBI mailing lists
<
http://www.symbolstone.org/technology/perl/DBI/tidbits>
� DBI Perl Journal website <
http://www.tpj.com>
� ``DBperl'' This article, published in the November 1996 edition of
``Dr. Dobbs Journal''.
� ``The Perl5 Database Interface'' a book to be written by Alligator
Descartes and published by O'Reilly and Associates.
The mailing lists that users may participate in are:
� Mailing lists <
http://www.fugue.com/dbi>
� dbi-announce Email:
[email protected] with a message
body of 'subscribe'
� dbi-dev For developers Email:
[email protected] with a
message body of 'subscribe'
� dbi-users general discussion Email:
[email protected]
with a message body of 'subscribe'
� US Mailing List Archives <
http://outside.organic.com/mail-
archives/dbi-users/>
� European Mailing List Archives <
http://www.rosat.mpe-
garching.mpg.de/mailing-lists/PerlDB-Interest>
14.2.5. Is DBI supported under Windows 95 / NT platforms?
The DBI and DBD::Oracle Win32 ports are now a standard part of DBI,
so, downloading DBI of version higher than 0.81 should work fine. You
can access Microsoft Access and SQL-Server databases from DBI via
ODBC. Supplied with DBI-0.79 (and later) is DBI 'emulation layer' for
the Win32::ODBC module. It's called DBI::W32ODBC. You will need the
Win32::ODBC module.
� Win32 DBI <
http://www.symbolstone.org/technology/perl/DBI>
� Win32 ODBC <
http://www.roth.net>
� Perl interface to Microsoft SQL server
<
http://www.algonet.se/~sommar/mssql>
14.2.6. Commercial Support and Training
PERL CLINIC : The Perl Clinic can arrange commercial support contracts
for Perl, DBI, DBD::Oracle and Oraperl. Support is provided by the
company with whom Tim Bunce, author of DBI, works. For more
information on their services, please see :
� Support <
http://www.perlclinic.com>
� Support <
http://www.perldirect.com>
� Training <
http://www.westlake.com/training>
14.3. Testing Perl interface
See the section - ``Testing Perl PostgreSQL interface''
15. PostgreSQL Management Tools
15.1. PGACCESS - A GUI Tool for PostgreSQL Management
PgAccess is a Tcl/Tk interface to PostgreSQL. It is already included
in the distribution of PostgreSQL. You may want to check out this web
site for a newer copy
� <
http://www.flex.ro/pgaccess>
� If you have any comment, suggestion for improvements, e-mail to :
[email protected]
Usage of pgaccess -
___________________________________________________________________
# man xhost
# xhost +
# su - postgres
bash$ man pgaccess
bash$ export DISPLAY=<hostname>:0.0
bash$ pgaccess mydatabase
___________________________________________________________________
Features of PgAccess
PgAccess windows - Main window, Table builder, Table(query) view,
Visual query builder.
Tables
� opening tables for viewing, max 200 records (changed by preferences
menu)
� column resizing, dragging the vertical grid line (better in table
space rather than in the table header)
� text wrap in cells - layout saved for every table
� import/export to external files (SDF,CSV)
� filter capabilities (enter filter like (price>3.14)
� sort order capabilities (enter manually the sort field(s))
� editing in place
� improved table generator assistant
� improved field editing
Queries
� define , edit and stores "user defined queries"
� store queries as views
� execution of queries
� viewing of select type queries result
� query deleting and renaming
� Visual query builder with drag & drop capabilities. For any of you
who had installed the Tcl/Tk plugin for Netscape Navigator, you can
see it at work clicking here
Sequences
� defines sequences, delete them and inspect them Functions
� define, inspect and delete functions in SQL language
Future implementation will have
� table design (add new fields, renaming, etc.)
� function definition
� report generator
� basic scripting
INFORMATION ABOUT LIBGTCL
You will need the PostgreSQL to Tcl interface library libgtcl, lined
as a Tcl/Tk 'load'-able module. The libpgtcl and the source is located
in the PostgreSQL directory /src/interfaces/libpgtcl. Specifically,
you will need a libpgtcl library that is 'load'-able from Tcl/Tk. This
is technically different from an ordinary PostgreSQL loadable object
file, because libpgtcl is a collection of object files. Under Linux,
this is called libpgtcl.so. You can download from the above site a
version already compiled for Linux i386 systems. Just copy libpgtcl.so
into your system library director (/usr/lib). One of the solutions is
to remove from the source the line containing load libpgtcl.so and to
load pgaccess.tcl not with wish, but with pgwish (or wishpg) that wish
that was linked with libpgtcl library.
If you get crypt not found during compilation pgaccess source tree
then use -lcrypt.
15.2. GtkSQL Graphical Query Tool for PostgreSQL
GtkSQL is a graphical query tool (like PostgreSQL's psql). It is
released under the GNU GPL license, and was developped using Gtk+
1.2.3 and PostgreSQL 6.3. The main site of GtkSQL is at
<
http://gtksql.sourceforge.net>
Its main features are :
1. multiple SQL buffers
2. SQL keywords, table names and fields autocompletion
3. easy displaying of table definition
4. PostgreSQL and MySQL support (and easy addition of other databases)
The current version is GtkSQL v. 0.3. You can get the source from
<
https://sourceforge.net/project/?form_grp=533>
15.3. Windows Interactive Query Tool for PostgreSQL (WISQL or MPSQL)
MPSQL provides users with a graphical SQL interface to PostgresSQL.
MPSQL is similar to Oracle's SQL Worksheet and Microsoft SQL Server's
query tool WISQL. It has nice GUI and has history of commands. Also
you can cut and paste and it has other nice features to improve your
productivity.
� <
http://www.troubador.com/~keidav/index.html>
� Email:
[email protected]
� <
http://www.ucolick.org/~de/> in file tcl_syb/wisql.html
� <
http://www.troubador.com/~keidav/index.html>
� Email:
[email protected]
15.4. Interactive Query Tool (ISQL) for PostgreSQL called PSQL
ISQL is for character command line terminals. This is included in the
distribution, and is called "psql". Very similar to Sybase ISQL,
Oracle SQLplus. At unix prompt give command 'psql' which will put you
in psql> prompt.
bash# su - postgres
bash$ man psql
bash$ psql mydatabase
Type \h to see help of commands.
Very user friendly and easy to use. Can also be accessed from shell
scripts.
15.5. MPMGR - A Database Management Tool for PostgresSQL
MPMGR will provide a graphical management interface for PostgresSQL.
You can find it at
� <
http://www.mutinybaysoftware.com/>
� Email:
[email protected]
� <
http://www.troubador.com/~keidav/index.html>
� Email:
[email protected]
� <
http://www.ucolick.org/~de> in file tcl_syb/wisql.html
� WISQL for PostgreSQL <
http://www.ucolick.org/~de/Tcl/pictures>
� Email:
[email protected]
15.6. PgAdmin, PhpPgAdmin tools
� PgAdmin tool for Windows 95/NT Database design tool for PostgreSQL
for Windows 95/NT <
http://www.pgadmin.freeserve.co.uk>
� Web based admin tool - PhpPgAdmin for Postgresql is at
<
http://www.phpwizard.net/projects/phpPgAdmin>
15.7. PgBash - SQL shell tool
PgBash has functionality which is similar to psql. And, PgBash
provides the useful functionality in making flexible interactive
operational environment using bash alias, function, the history
editing, etc.
The main site of PgBash is at
<
http://www.psn.co.jp/PostgreSQL/pgbash/index-e.html>
PgBash is a shell which included the "direct SQL" or the "embedded
SQL" interface for PostgreSQL by the improvement on the bash(current
version 2.03) shell. PgBash can be used as a log-in shell, a sub-
shell(the shell started from a shell) and a shell program use.
Here, "Direct SQL" shows functionality which immediately outputs the
result to the "standard output". And "Embedding SQL" shows
functionality which sets the retrieval result into the shell variable
and which deals with in shell script language.
SQL statement(terminal character is a semicolon) is handled as one
shell command, it is possible to execute the SQL statement with
pipeline, redirection and background_job options. In addition, by
using the exec_sql command, it is possible to execute SQL statement
with the various options. The executive example of SQL is shown next.
______________________________________________________________________
prompt> /usr/local/bin/pgbash .....Start of pgbash
pgbash> connect to
[email protected] user sakaida; .....connect to database
pgbash> select * from test limit 100; | more .....with pipeline
pgbash> select * from test; > /tmp/sel.dat & .....with redirect+background_Job
pgbash> addr='Osaka'
pgbash> insert into test values(
> 111,'name', .....can start new line
> '$addr' .....use shell variable
> );
pgbash> connect to
[email protected] user postgres;
pgbash> set connection db2; .....set current D/B to db2
pgbash> select * from test; .....select db2's test
pgbash> exec_sql -d db3 "select * from test3".....change connection to db3
pgbash> ls
pgbash> begin;
pgbash> declare cur cursor for select * from test;
pgbash> fetch in cur into :AA,:BB; .....set shell variables
pgbash> echo "AA=$AA, BB=$BB"
pgbash> end;
pgbash> fc fetch .....edit history and go
pgbash> !echo .....retry echo
pgbash> disconnect all .....disconnect all connections
pgbash> exit .....End of pgbash
______________________________________________________________________
15.8. Webmin Tool for PostgreSQL
The webmin tool (administration of an Unix machine through a, secure
if you want, webpage) has a PostgreSQL module as of the latest release
(version 0.82). With this module you can add users, groups, databases,
tables, view tables.
You can find webmin on <
http://www.webmin.com/webmin>
16. CPUs for PostgreSQL
See the document <
http://metalab.unc.edu/LDP/HOWTO/CPU-Design-
HOWTO.html> for list of CPUs available for PostgreSQL and also this
document gives details on CPU design.
The following CPUs (both 64-bit and 32-bit) are available for
PostgreSQL. All these CPUs run Linux.
� Main CPU site is : Google Search engine CPU site
"Computers>Hardware>Components>Microprocessors"
<
http://directory.google.com/Top/Computers/Hardware/Components/Microprocessors>
The following is GNU/GPL open-source CPU list:
� Open-source CPU site - Google Search "Computers>Hardware>Open
Source"
<
http://directory.google.com/Top/Computers/Hardware/Open_Source>
� OpenRISC 1000 Free 32-bit processor IP core competing with
proprietary ARM and MIPS is at
<
http://www.opencores.org/cores/or1k>
� OpenRISC 2000 is at <
http://www.opencores.org>
� European Space Agency's ESA-32bit and ESA-64bit CPUs "LEON" Sparc
<
http://www.estec.esa.nl/wsmwww/leon>
� GNU/GPL Freedom 64-bit F-CPU <
http://www.f-cpu.org> or at
<
http://f-cpu.tux.org> mirror site at <
http://www.f-cpu.de>
� STM 32-bit, 2-way superscalar RISC CPU <
http://www.asahi-
net.or.jp/~uf8e-itu>
� Free microprocessor and DSP IP cores written in Verilog or VHDL
<
http://www.cmosexod.com>
� Free hardware cores to speed development
<
http://www.scrap.de/html/opencore.htm>
� Opencores org - open source, free IP cores
<
http://www.opencores.org>
� Linux open hardware and free EDA systems
<
http://opencollector.org>
� ARM CPU <
http://www.arm.com/Documentation>
� Cogent CPUs <
http://www.cogcomp.com>
The following is commercial CPU list:
� Russian E2k 64-bit CPU (Very fast CPU !!!) website :
<
http://www.elbrus.ru/roadmap/e2k.html> Elbrus is now partnered
(alliance) with Sun Microsystems of USA
� Korean CPU from Samsung 64-bit CPU original from DEC Alpha
<
http://www.samsungsemi.com> Alpha-64bit CPU is at
<
http://www.alpha-processor.com> Now there is collaboration between
Samsumg, Compaq of USA on Alpha CPU
� Intel IA 64 <
http://developer.intel.com/design/ia-64>
� Transmeta crusoe CPU and in near future Transmeta's 64-bit CPU
<
http://www.transmeta.com>
� Sun Ultra-sparc 64-bit CPU <
http://www.sun.com> or
<
http://www.sunmicrosystems.com>
� MIPS RISC CPUs <
http://www.mips.com>
� Silicon Graphics MIPS Architecture CPUs
<
http://www.sgi.com/processors>
� IDT MIPS Architecture CPUs <
http://www.idt.com>
� IBM Power PC (motorola)
<
http://www.motorola.com/SPS/PowerPC/index.html>
� Motorola embedded processors. SPS processor based on PowerPC, M-
CORE, ColdFire, M68k, or M68HC cores <
http://www.mot-sps.com>
� Hitachi SuperH 64-bit RISC processor SH7750
<
http://www.hitachi.com> sold at $40 per cpu in quantities of
10,000
� Fujitsu 64-bit processor <
http://www.fujitsu.com>
� HAL-Fujitsu (California) Super-Sparc 64-bit processor
<
http://www.hal.com> also compatible to Sun's sparc architecture.
� Seimens Pyramid CPU from Pyramid Technologies
� Intel X86 series 32-bit CPUs Pentiums, Celeron etc..
� AMDs X86 series 32-bit CPUs K-6, Athlon etc..
� National's Cyrix X86 series 32-bit CPUs Cyrix etc..
� Other CPUs from other countries (Taiwan, Korea, Japan) ?? Let me
know...
Other important CPU sites are at -
� World-wide 24-hour news on CPUs
<
http://www.newsnow.co.uk/cgi/NewsNow/NewsLink.htm?Theme=Processors>
� The computer architecture site is at
<
http://www.cs.wisc.edu/~arch/www>
� ARM CPU <
http://www.arm.com/Documentation>
� Great CPUs <
http://www.cs.uregina.ca/~bayko/cpu.html>
� Microdesign resources <
http://www.mdronline.com>
17. Setting up multi-boxes PostgreSQL with just one monitor
If you do want to spend money on hardware switches than you can use
VNC (Virtual Network Computing) Technology from the telecom giant AT &
T. VNC is GPLed and is a free software. Using VNC you can run
PostgreSQL programs on computers without monitors and display on
remote boxes with monitors!! But the boxes must be connected via
ethernet Network Interface Cards. VNC is at
<
http://www.uk.research.att.com/vnc>
You can stack up multiple CPU-boxes and connect to just one monitor
and use the KVM (Keyboard, Video, Monitor) switch box to select the
host. This saves space and avoids a lot of clutter and also
eliminates monitor, keyboard and the mouse (saving anywhere from 100
to 500 US dollars per set).
Using this switch box, you can stack up many PostgreSQL servers
(development, test, production), Web servers, ftp servers, Intranet
servers, Mail servers, News servers in a tower shelf. The switch box
can be used for controlling Windows 95/NT or OS/2 boxes as well.
Please check out these sites:
� DataComm Warehouse Inc at 1-800-328-2261. They supply all varieties
of computer hardware <
http://www.warehouse.com> 4-port Manual KVM
switch (PS/2) is about $89.99 Part No. DDS1354
� Network Technologies Inc
<
http://www.networktechinc.com/servswt.html> (120 dollars/PC 8
ports) which lists
� Scene Double Inc, England
<
http://www.scene.demon.co.uk/qswitch.htm>
� Cybex corporation <
http://www.cybex.com>
� Raritan Inc <
http://www.raritan.com>
� RealStar Solutions Inc <
http://www.real-star.com/kvm.htm>
� Belkin Inc <
http://www.belkin.com>
� Better Box Communications Ltd.
<
http://www.betterbox.com/info.html>
� Go to nearest hardware store and ask for "Server Switch" also known
as "KVM Auto Switches".
Search engine yahoo to find more companies with "Server Switches" or
"KVM Switches".
It is strongly recommended to have a dedicated unix box for each
PostgreSQL data-server for better performance. No other application
program/processes should run on this box. See the Business section of
your local newspapers for local vendors selling only intel box, 13"
monochrome monitor (very low cost monitor). Local vendors sell just
the hardware without any Microsoft Windows/DOS. You do not need a
color monitor for the database server, as you can do remote
administration from color PC workstation.
You can buy bare-bone computer hardware from online stores. You can
get good rates in "Online Auctions"
� Online store and auction hall <
http://www.egghead.com>
� Online store <
http://www.buy.com>
� Bidding store <
http://www.ubid.com>
Get RedHat (or some other distribution of) Linux cdrom from below -
� Linux System Labs Web site: <
http://www.lsl.com/> 7 (U.S.
dollars)
� Cheap Bytes Inc Web site: <
http://www.cheapbytes.com/> 7 (U.S.
dollars)
Make sure that the hardware you purchase is supported by Redhat
Linux. Check the ftp site of Redhat for recommended hardware like
SCSI adapters, video cards before buying. For just $ 600 you will
get a powerful intel box with Redhat Linux running PostgreSQL. Use
odbc/jdbc/perl/tcl to connect to PostgreSQL from Windows95, OS/2,
Unix Motif or web browser (e.g. Redbaron, Opera, Netscape, 20
others). (Web browsers are very fast becoming the standard GUI
client).
Using KVM switch you can control many cpu boxes by just one monitor
and one keyboard!
18. Web-Application-Servers for PostgreSQL
Several Web-Application-Servers work with PostgreSQL both open-source
and commercial versions. The popular open-source Web-Application-
Servers are Perl based Application Servers like Mason, WIRM,
Velocigen, Enhydra(Java) and Zope(Python) and commercial Web-
Application-Servers are IBM Websphere, BEA Weblogic.
It is recommeded that you use secure web server like Apache + mod_ssl
+ OpenSSL. See Redhat StrongHold secure server at
<
http://www.c2.net/products/sh3>.
Web Application Servers can be classified according to the programming
language which they support. You must choose a Web Application server
based on the programming language which you like the most.
Classifications of Web Application servers are:
� Based on PERL language
� Based on PHP language (which is similar to PERL, little Java-like)
� Based on Python language (Object oriented scripting language)
� Based on Java language (Sun Microsystems Java)
� Based on Tcl language (Tcl/Tk - called "Tickle" scripting language)
� Based on C++ language (C++ and CORBA)
� Based on Pike (C++ like scripting language)
18.1. PERL Web Application Servers
Perl language has a very long life just like "C" language, and Perl
will be in use for a long time in the future! Perl runs 3 times
faster than Java for some operations (but Java runs faster than perl
for some operations). Java is a very complex system with virtual
machine and interpreter which makes it extremely slow, unstable and
unreliable. Perl is very simple, fast and object oriented.
Also Perl programs can be easily compiled for even better performance.
Use Perl2Exe which is a command line utility for converting perl
scripts to executable files <
http://www.indigostar.com/perl2exe.htm>
The following Web Applicaiton servers are available for PERL
� Mason <
http://www.masonhq.com> is a powerful Perl-based web site
development and delivery engine. With Mason you can embed Perl code
in your HTML and construct pages from shared, reusable components.
� BingoX <
http://opensource.cnation.com/projects/BingoX> is an open
source, object oriented Web Application Framework written in
mod_perl meant to dramatically reduce the time required to build
large dynamic, database driven web sites and applications.
� SmartWorker is a collection of Perl classes that allow you to build
web applications like they were true applications and not just HTML
templates with random embedded code. SmartWorker
<
http://www.smartworker.org>
� Apache-Perl integration project With mod_perl it is possible to
write Apache modules entirely in Perl. In addition, the persistent
interpreter embedded in the server avoids the overhead of starting
an external interpreter and the penalty of Perl start-up time.
Visit <
http://perl.apache.org> and also see mod_perl_garden
project at <
http://modperl.sourcegarden.org>
� Apache::ASP <
http://www.apache-asp.org> provides an Active Server
Pages port to the Apache Web Server with Perl as the host scripting
language. Apache::ASP allows a developer to create dynamic web
applications with session management and embedded perl code. There
are also many powerful extensions, including XML taglibs, XSLT
rendering, and new events not originally part of the ASP API.
� WIRM (Web Interface Repository Manager) is a Perl-based application
server that provides a high-level programming environment for
developing web information systems. The WIRM consists of an object-
relational database and a suite of Perl interfaces for visualizing,
integrating and analyzing heterogeneous multimedia data. WIRM
provides facilities for creating context-sensitive views over a
multimedia database, allowing developers to rapidly build dynamic
web sites that adapt their content and presentation to multiple
classes of end-users. Visit <
http://www.wirm.org>
� EmbPerl <
http://perl.apache.org/embperl> Embperl gives you the
power to embed Perl code in your HTML documents. Using Perl means
being able to use a very elaborate programming language, which is
widely used for WWW purposes. You can also use hundreds of Perl
modules which have already been written - including DBI - for
database access to a growing number of database systems.
� ePerl <
http://www.engelschall.com/sw/eperl> interprets an ASCII
file bristled with Perl 5 program statements by evaluating the Perl
5 code while passing through the plain ASCII data. It can operate
in various ways: As a stand-alone Unix filter or integrated Perl 5
module for general file generation tasks and as a powerful
Webserver scripting language for dynamic HTML page programming.
� XPP <
http://opensource.cnation.com/projects/XPP> XPP stands for
'XPP Parses Perl' or 'XPML Page Parser', and is a fast/efficient
HTML parser that parses embedded perl, as well as HTML like tags,
from dynamic html pages called XPML pages.
� Gamla - a perl-based RAD and application server The gamla project
aims to create a Rapid Application Development (RAD) tool and a web
application server based on Perl. All the source code produced by
the Gamla project will be under the public domain.
Gamla at <
http://gamla.iglu.org.il>
� AxKit <
http://www.axkit.org> is an XML Application Server for
Apache (and mod_perl). It provides on-the-fly conversion from XML
to any format, such as HTML, WAP or text using either W3C standard
techniques, or flexible custom code. AxKit also uses a built-in
Perl interpreter to provide some amazingly powerful techniques for
XML transformation.
The emphasis with AxKit is on separation of content from
presentation. The pipelining technique that AxKit uses allows
content to be converted to a presentable format in stages, allowing
certain platforms to see data differently to others. AxKit allows
web designers to focus on web site design, content developers to
work on a purely content basis, and webmasters to focus on their
core competencies.
Commercial Web Application Servers for Perl:
� Zelerate AllCommerce
<
http://www.zelerate.org/html/eng/home.shtml> is a commerce,
content, customer and relationship management system. This high-
performance, scalable Internet application is written in Perl and
uses a backend database.
� VelociGen serves dynamic content stored in XML, the database or
live data feeds as fast as static HTML - up to 60x faster than CGI
without the need to modify your exiting application. VelociGen
also makes new development easier with server-side XML tags, crash
protection and load balancing across multiple machines.
VelociGen plugs seamlessly into any Web server on any platform,
increasing server performance and speeding the response times of
dynamic content driven web sites. VelociGen can process large
volumes of simultaneous requests as much as 10x faster than Java
Servlets and 4x faster than Cold Fusion.
Velocigen <
http://www.binevolve.com/velocigen>
18.2. PHP Web Application Servers
The following Web Applicaiton servers are available for PHP
� Midgard PHP Web Application server is based on the PHP scripting
language and PHP runs extremely fast - faster than Java. The main
site of Midgard is at <
http://www.midgard-project.org> PHP can be
compiled with Zend compiler and optimizer <
http://www.zend.com>.
PHP runs very fast and is about 5 to 10 times faster than Java.
See ``Midgard Installation'' and also PHP HOWTO at
<
http://www.linuxdoc.org/HOWTO/PHP-HOWTO.html>
� Ariadne <
http://www.muze.nl/software/ariadne> is a web application
system. It consists of a complete framework for the easy
development and management of web applications, using PHP. The
system uses a modular approach, using abstract interfaces for all
transactions. This results in maximum freedom to change parts of
the systems workings or add new functionality without needing to
reprogram other parts
18.3. Lutris Corp "Enhydra Enterprise" (Java)
Enhydra supports PostgreSQL database. Enhydra is an immensely popular
Java/XML/J2EE Web-Application-Server created by 'Lutris Corporation'.
It is the world's best Java/XML/J2EE Web-Application server. It
supports EJB, Servlets, JSP, JNDI, JDBC, JTA, CORBA, XMLC/Rocks, DODS
and internationalization. It is used by many large fortune 500
companies in US and Europe. Companies like "French Telecom" are
directly sponsoring the Enhydra. It is written in 100% pure Java and
is available from <
http://www.enhydra.org>. Enhydra is an open source
code project but is commercially sold and supported by Lutris Corp.
Visit <
http://www.lutris.com>
See tutorial on setting up the PostgreSQL with Enhydra
<
http://www.enhydra.org/software/documentation/enhydra/NewApp-DODS-
Tutorial-PGSQL.html> and see also Setup database with Enhydra
<
http://www.enhydra.org/software/documentation/enhydra/Enhydra-NewApp-
DODS-Tutorial.htm>.
You would use Borland Corp's JBuilder along with Enhydra. JBuilder is
at <
http://www.inprise.com>
See also Enterprise Java HOWTO at
<
http://www.linuxdoc.org/HOWTO/Enterprise-Java-for-Linux-HOWTO.html>
18.4. Zope (Python)
Python is becoming immensely popular "pure" object-oriented scripting
language. Zope is a Web-Application server and provides interfaces to
PostgreSQL. Zope is available at <
http://www.zope.org> Python is at
<
http://www.python.org>
18.5. OpenACS (Tcl Language)
OpenACS (Open ArsDigita Community System) <
http://openacs.org> is an
advanced toolkit for building scalable, community-oriented web
applications. It relies on AOLserver, a web/application server, and
PostgreSQL, a true ACID-compliant RDBMS. These are two high-quality
products available for free under open-source licenses.
ACS is created by ArsDigita, <
http://www.arsdigita.com>, their ACS
(ArsDigita Community System) attempts to be as DB independent as
possible, though it is based on Oracle (hence Open ACS have to take
time out to port it).
See also <
http://www.appserver-zone.com>
18.6. C++, CORBA Web Application Servers
� PortalSphere Web Application Server is built in C++ and runs on
Unix (and Linux) for ultimate in speed and stability. Strictly
adhering to the CORBA standard, PortalSphere supports both the
standard Internet HTTP communications protocol and the IIOP point-
to-point protocol for ultra-high-speed client-server links. Coupled
with direct (native) access to all popular databases, these
features give PortalSphere lightening-fast performance and the
unique inherent ability to support real-time events over the
internet. PortalSphere is - Up to 100 X faster than HTTP/CGI,
Direct (native) access to most popular databases, Scalable to
10,000+ concurrent user sessions.
Visit PortalSphere at <
http://www.portalsphere.com/overview.html>.
� FlashPoint C++,C,PERL Web Application Server project exists to
support high speed web application service in a multi-threaded
environment, to support a variety of development languages
including C & C++, and to support good software engineering
practices to a degree difficult in many other environments. It can
be used alongside Apache, and in some instances can replace it,
depending on your needs Visit
<
http://www.bouldersoftware.com/products/flashpoint> and download
the from FlashPoint Redhat RPM
<
http://www.bouldersoftware.com/products/flashpoint/download.html>
package.
� "C Server Pages" <
http://cserverpages.20m.com> is One efficient
and Scalable Application Server written in C/C++, which powers web
server pages written in C++ and Templates with Dynamics Elements
embedded. You can use the approach you prefer or both. You can
build your business objects using C++. Your pages can be the CORBA
clients for any ORB in the market. Has connectivity to all SQL
databases.
18.7. Pike, Roxen Web Application Server
Pike is a dynamic programming language with a syntax similar to C++.
It is simple to learn, does not require long compilation passes and
has powerful built-in data types allowing simple and fast data
manipulation. Pike is released under the GNU/GPL general public
license.
Pike is a very powerful object oriented scripting language and since
it's syntax is identical to C++ it is expected that it's popularity
will explode in coming years.
Pike is at <
http://pike.roxen.com> and Roxen web server is at
<
http://www.roxen.com>.
Roxen is a modular web server that has a complete DB interface, and
includes Postgres support. It has full support for SSL, and is
released under the GPL. Roxen is written using Pike scripting
language.
18.8. Web Application Servers Directory
Visit Web Application Servers <
http://198.85.71.76/html.html>
directory which has "Yellow Pages".
19. Applications and Tools for PostgreSQL
19.1. PostgreSQL 4GL for web database applications - AppGEN Develop�
ment System
AppGEN can be downloaded from
� <
http://www.man.ac.uk/~whaley/ag/appgen.html>
� <
ftp://ftp.mcc.ac.uk/pub/linux/ALPHA/AppGEN>.
AppGEN is a high level fourth generation language and application
generator for producing World Wide Web (WWW) based applications.
These applications are typically used over the internet or within a
corporate intranet. AppGEN applications are implemented as C
scripts conforming to the Common Gateway Interface (CGI) standard
supported by most Web Servers.
To use AppGEN you will need the following :-
PostgresSQL, relational database management system
A CGI compatible web server such as NCSA's HTTPD
An ansi C compiler such as GCC
AppGEN consists of the following Unix (Linux) executables :-
� defgen, which produces a basic template application from a logical
data structure. The applications are capable of adding, updating,
deleting and searching for records within the database whilst
automatically maintaining referential integrity.
� appgen, the AppGEN compiler which compiles the appgen source code
into CGI executable C source and HTML formatted documents ready for
deployment on a web server.
� dbf2sql, an utility for converting dBase III compatible .dbf files
into executable SQL scripts. This enables data stored in most
DOS/Windows based database packages to be migrated to a SQL server
such as PostgresSQL.
� In addition, AppGEN comprises of a collection of HTML documents,
GIF files and Java applets which are used at runtime by the system.
And of course, like all good software, the full source code is
included.
The author, Andrew Whaley, can be contacted on
�
[email protected]
19.2. WWW Web interface for PostgresSQL - DBENGINE
dbengine a plug 'n play Web interface for PostgreSQL created by Ingo
Ciechowski. It is at
� <
http://www.cis-computer.com/software/dbengine>
About DBENGINE : dbengine is an interface between the WWW and
Postgres95 which provides simple access to any existing database
within just a few minutes.
PHP gives you a Perl like language in your documents, but no real Perl
while AppGen and wdb-p95 require that you create some configuration
file for each of your databases -- sound's like you'll first of all
have to learn some sort of new meta language before you can get
started.
Unlike other tools you don't have to learn any special programming or
scripting language to get started with dbengine. Also there's no
configuration file for each database, so you don't have to get
familiar with such a new structure. However - in case you want to
gain access to the full features of dbengine it'd be a good idea to
know the Perl language.
The whole system can be configured by simple manipulations of an
additional database that contains closer information about how to
visualize your database access. You can even specify virtual Fields
which are calculated on the fly right before they're displayed on the
screen.
19.3. Apache Webserver Module for PostgreSQL - NeoSoft NeoWebScript
Apache is a well-known Web Server. And a module to interface
PostgreSQL to Apache Webserver is at -
� <
http://www.neosoft.com/neowebscript/>
NeoWebScript is a programming language that allows both simple and
complex programs to be embedded into HTML files.
When an HTML page containing embedded NeoWebScript is requested, the
NeoWebScript-enabled webserver executes the embedded script(s),
producing a webpage containing customized content created by the
program.
NeoWebScript is a fast, secure, easy to learn way to do powerful,
server-based interactive programming directly in the HTML code in web
pages. With NeoWebScript, counters, email forms, graffiti walls, guest
books and visitor tracking are all easy, even for a beginning
programmer. See how well NeoWebScript holds its' own vs. PERL and
JavaScript.
If you'd like to install NeoWebScript on your webserver, your
Webmaster needs to read our Sysop FAQ to get started. Theory of
Operations will explain how NeoWebScript works, while installation
will take them through the steps. Management deals with configuration
issues and running the server, tests let you verify correct
NeoWebScript operation, and troubleshooting deals with server
problems.
There is no cost to you to use NeoWebScript-2.2 for your ISP, your
intranet, or your extranet. You'll see a full license when you
register to download, but it costs $ 99 if you want to embed it in
your own product or use it in a commerce (eg. SSL) server.
NeoWebScript is a module for the Apache webserver that allows you to
embed the Tcl/Tk programming language in your webpages as a scripting
tool. It was invented by Karl Lehenbauer, NeoSoft's Chief Technical
Officer, and documented, enhanced and extended by NeoSoft's
programmers and technical writers.
The Apache webserver is the world's most popular webserver, accounting
for 68 % of the sites polled.
Tcl/Tk is the powerful, free, cross-platform scripting language
developed by Dr. John Ousterhout. In his own words
"Tcl/Tk lets software developers get the job done ten times faster
than with toolkits based on C or C++. It's also a great glue language
for making existing applications work together and making them more
graphical and Internet-aware."
Karl Lehenbauer, Founder and Chief Technical Officer of NeoSoft, has
been part of Tcl/Tk development from the very beginning. Together
with Mark Diehkans, they authored Extended Tcl, also known as TclX or
NeoSoft Tcl, a powerful set of extensions to the language. Many of the
current core Tcl commands originated in Extended Tcl, and were then
imported into the core language by Dr. Ousterhout.
NeoSoft Inc., 1770 St. James Place, Suite 500, Houston, TX 77056 USA
19.4. HEITML server side extension of HTML and a 4GL language for
PostgreSQL
Tool heitml is another way to interface postgres with the world wide
web. For more details contact
Helmut Emmelmann H.E.I. Informationssyteme GmbH
Wimpfenerstrasse 23 Tel. 49-621-795141
68259 Mannheim Germany Fax. 49-621-795161
� E-mail Mr.Helmut Emmelmann at
[email protected]
� Heitml main web site <
http://www.heitml.com>
� Heitml secondary web site <
http://www.h-e-i.deom>
heitml is a server side extension of HTML and a 4GL language at the
same time. People can write web applications in the HTML style by
using new HTML-like tags.
heitml (pronounced "Hi"-TML) is an extension of HTML and a full-
featured 4th generation language that enables Web-based Applications
to interact with data stored in SQL databases, without resorting to
complex CGI scripts.
heitml extends HTML on the sever side, dynamically converting ".hei"
files to HTML format and so is compatible with any web browser.It
embraces the familiar, easy-to-use HTML syntax and provides a large
assortment of pre-developed Tags and Libraries to take care of tasks
that formerly required CGI. As XML, heitml provides user defined tags.
With heitml the user defined markup can be translated to HTML and send
to a browser.
heitml targets both HTML designers and professional programmers alike.
HTML designers can use heitml Tags to build dynamic web pages, access
SQL databases, or create complete web applications. Counters,
registration databases, search forms, email forms, or hierarchical
menues can all be created simply by using the pre-developed HTML-like
Tags found in the many Component Libraries.
For programmers heitml embeds a complete forth generation language in
HTML
(e.g. <if>, <while>, and <let> Tags),
plus powerful expression evaluation with integer, real, boolean,
string, and tuple data types. Tuples have reference semantics as in
modern object oriented languages and are stored on a heap. heitml
variables including all complex data structures stored on the heap
maintain their values between pages using the Session Mode. It is pos�
sible to define your own tags or environment tags and even re-define
HTML-tags.
heitml makes it possible to
- - - develop Web Sites in a structured and modular way, drastically
reducing maintenance overhead.
- - - develop intelligent and interactive Web Sites, with content that
dynamically adapts itself to user needs.
- - - show the content of SQL databases with no programming other than
to use our library of prefined "dba" Tags.
- - - develop complex database and Catalog Shopping applications using
Session Variables
heitml runs on Linux with any Web Server using the CGI interface, and
is especially fast (avoiding the CGI overhead) within the APACHE Web
Server using the apache API. Currently MSQL (Version 1 and 2),
PostgreSQL (Version 6), mysql, and the yard databases are supported).
heitml also works on Linux, BSDi, Solaris and SunOS, as well as
Windows NT with CGI and ISAPI and ODBC and Windows 95.
heitml (on linux) is free for research, non-commercial and private
usage. Commercial Web Sites must pay a licensing fee. The fully
operational version of heitml is available for a trial period
downloaded freely. (Note, however, that each ".hei" Web Page you
develop will display a message identifying it as the version for non-
commercial use. After registration, you will receive a key to switch
off the message without having to re-install the program.)
heitml (pronounced "Hi"-TML) significantly extends and enhances the
functionality of HTML by definable tags and full programming features.
This makes dynamic content and database applications possible simply
within the HTML world, without CGI and without external scripting or
programming languages. This means you, as an HTML author, can embed
applications in your web pages, simply by using some new tags without
CGI and without programming. As an advanced user or programmer on the
other hand you can create and program powerful tag libraries. This
approach makes heitml suitable for HTML newcomers and professional
programmers alike. heitml runs on the web server and dynamically
generates HTML, so heitml is compatible with the internet standards
and with any web browser. It allows full access to databases while
shielding the user from any unneccessary CGI complexity. heitml has
been developed according to the newst research and in compiler
construction and transaction systems.
heitml pages are developed just the same way as HTML pages, with a
text editor or HTML editor, and placed on the web server as usual.
However now pages can contain dynamic heitml tags and access tag
libraries. You can use these tags to access the database, to create
dynamic content, to send emails, and even to create powerful
applications like registration databases and shopping systems.
HTML newcomers and professional programmers alike will be amazed at
how quickly and easily they can design exciting applications like our
Interactive Guestbook without resorting to complex and difficult to
learn CGI scripts, simply by using the tools provided in our dba
Library.
heitml is accompanied by a wide range of tag libraries, to create
guestbooks, database maintenance applications, extensible query forms,
powerful email forms or structure your web site using a hierarchic
menu. These tools are ready to go, just add the corresponding tags to
your web site.
As an experienced programmer you can make fully use of the heitml
persistent dynamic tuple architecture : heitml is not just a scripting
language with dynamic typing, full power expression evaluation,
recursive procedures and extensive parameter passing features, but it
also features persistent dynamic tuples to automatically keep session
data of any size.
19.5. America On-line AOL Web server for PostgreSQL
The no-cost commercial webserver, AOLserver supports database
connections to PostgreSQL for more information see
� AOL Web Server home <
http://www.aolserver.com>
� Introduction to AOLserver by Philip Greenspun
<
http://photo.net/wtr/aolserver/introduction-1.html>
AOLserver is a fast, fully multithreaded, Tcl enabled webserver.
But not only that, it is a complete database-backed web development
platform. With AOLserver you can have multiple pooled connections
to PostgreSQL (and other RBDMSs) that can be shared among different
threads. AOLserver has a Tcl and C APIs that allow you to develop
powerful dynamic websites. All this since 1995. It is licensed
under the APL (AOLserver Public License) or the GPL, thus being
totally free software. The Tcl API is the most useful for web
sites. AOLserver has a set of powerful Tcl calls, such as
ns_sendmail (to send e-mail), ns_httpget (to fetch an URL),
ns_schedule (a cron-like feature to schedule procedures to run at
specific times), etc. You can also extend AOLserver's capabilities
very easily with the Tcl API. Each AOLserver virtual server can
have its own "library" of private Tcl scripts that are parsed by
AOLserver and become accessible to any page within that virtual
server. You can develop pages for AOLserver in three ways: - Plain
HTML - .tcl pages -- these are tcl programs that can return HTML
via the ns_write call. - .adp pages -- AOL Dynamic Pages. You
develop your pages in plain HTML but you can scape to Tcl code by
using <% %> or <%= %> much alike PHP or ASP. While AOLserver is a
great webserver with a superb architecture, where it really shines
is in database connectivity. AOLserver has its own database
abstraction layer that enables you to have it connected to
different RDBMSs without changing your code at all. The connections
do the RDBMS are pooled, persistent and are shared among different
threads. This allows for very fast connections and efficient use
of resources. AOLserver has drivers for all major RDBMSs:
PostgreSQL, Oracle, Sybase, Informix, Illustra, Solid, Interbase,
MySQL.
19.6. Problem/Project Tracking System Application Tool for PostgreSQL
This is at
� <
http://www.homeport.org/~shevett/pts/>
19.7. Convert dbase dbf files to PostgreSQL
The program dbf2msql works fine with mSQL and PostgreSQL. You can find
it at
� <
ftp://ftp.nerosworld.com/pub/SQL/dbf2sql/>
� <
ftp://ftp.postgresql.org/pub/contrib/dbf2pg-3.0.tar.gz>
� Pg2Xbase is a better package then dbf2pg
<
http://w3.man.torun.pl/~makler/prog/pg2xbase>
This program was written by Maarten Boekhold, Faculty of Electrical
Engineering TU Delft, NL Computer Architecture and Digital Technique
section
�
[email protected]
You can also use a python method to read dbf files and load into a
postgres database.
� See <
http://www.python.org>
19.8. Convert Microsoft Access MDB database files to PostgreSQL
MDB Tools is a planned set of libraries and utilities to facilitate
exporting data from MS Access databases (mdb files) into a multiuser
database such as Oracle, Sybase, DB2, Informix, MySQL, Postgresql, or
similar.
� Get MDB tool from <
http://mdbtools.sourceforge.net>
� Mailing list
<
http://lists.sourceforge.net/mailman/listinfo/mdbtools-dev>
19.9. Zeos Client
"Zeos" a program products for development and administration of the
database applications, with use OpenSource SQL-servers - MySQL,
PostgreSQL and InterBase <
http://www.zeos.dn.ua/eng/index.html>
19.10. Report Writer in Java
Generic Report Writer is a menu-driven report writer. It is not a
drag-and-drop interface. Works with PostgreSQL, MySQL, and Access. It
probably will work on any other database for which you have a Type 4
JDBC version 1 driver. It is at
<
http://www.geocities.com/SiliconValley/Ridge/4280/GenericReportWriter/grwhome.html>
20. Database Design Tool - Entity Relation Diagram Tool
"DeZign for databases" (
<
http://www.heraut.demon.nl/dezign/index.html>) is a database
development tool using an entity relationship diagram. It visually
supports the lay out of the entities and relationships and
automatically generates SQL-schemas for most leading databases.
"DeZign for databases" supports the logical and physical data-level
from a single specification achieved by using automatic foreign key
migration at design-time. Multiple display options include
entity/primary key/attributes inclusive foreign keys/attributes
exclusive foreign keys. "DeZign for databases" also supports domains
(user defined datatypes).
Reports generated by DeZign can be used for conveying complex designs
in simplified format to managers at various management levels. You can
generate reports, datadictionaries and databases by one simple click.
The following databases are supported: Oracle, Interbase, IBM DB2,
Sybase, MS Access (95/97/200), MS SQL Server, Paradox, dBase,
Informix, SQL-Anywhere, MySQL and PostgreSQL.
Heraut "DeZign for databases" is at ( <
http://www.heraut.demon.nl>)
21. Web Database Design/Implementation tool for PostgreSQL - EARP
� <
http://www.oswego.edu/Earp>
� <
ftp://ftp.oswego.edu> in the directory 'pub/unix/earp'.
21.1. What is EARP ?
The "Easily Adjustable Response Program" (EARP) created by David
Dougherty. EARP is a Web Database Design/Implementation tool, built
on top of the PostgreSQL database system. Its functionality includes:
� A Visual Design System.
� A sendmail interface. (can handle incoming and outgoing mail)
� An Enhanced Security Mechanism.
� A cgi driver.
21.2. Implementation
The main implementation of EARP is a CGI binary which runs under the
http daemon to provide access to the database server. All of the
design tools are built into the driver, no design takes place over
anything but the web. The tools themselves require a graphical
browser, the compatibility of objects designed with the tools is
implementation independent, based on designing individuals
preferences.
21.3. How does it work ?
One of the main features of EARP is that it uses an Object Oriented
approach to producing html pages which interface to the database. Most
pages will consist of several objects. Each object is produced by some
sort of tool and given a name, objects are then linked together in a
callable sequence by the page tool. Objects are also reusable across
multiple pages. Basic tools exist for HTML, Querys, Grabbing input
from forms, Extendable Formatting of Query and Input objects, and
Linking together of objects into other objects. More advanced tools
include the mail tool and the multithreaded query tool.
Another feature of EARP is advanced security. Access to various areas
of the EARP system can be limited in a variety of ways. To facilitate
its advanced security, EARP performs checks for each connection to the
system, determining what ids and groups the connecting agent belongs
to. Access to areas is defined seperately, and the combination decides
if access to a specific area of Earp is allowed. Moreover, all that is
required to implement the security features is an http server that
supports basic (or better) user authentication.
21.4. Where to get EARP ?
EARP is available via anonymous ftp from
� <
ftp://ftp.oswego.edu> in the directory 'pub/unix/earp'.
22. PHP Hypertext Preprocessor - Server-side html-embedded scripting
language for PostgreSQL
WWW Interface Tool is at -
� <
http://www.php.net>
� <
http://www.vex.net/php>
PHP also has a compiler called Zend which will vastly improve the
performance. First you will write your application in PHP
scripting language during development, testing and debugging. Once
the project is ready for deployment you will use the Zend compiler
to compile the PHP to create executable which will run very fast.
Old name is Professional Home Pages (PHP) and new name is PHP
Hypertext Pre-Processor
� Mirror sites are in many countries like www.COUNTRYCODE.php.net
� <
http://www.fe.de.php.net>
� <
http://www.sk.php.net>
� <
http://php.iquest.net/>
� Questions e-mail to :
[email protected]
PHP is a server-side html-embedded scripting language. It lets you
write simple scripts right in your .HTML files much like JavaScript
does, except, unlike JavaScript PHP is not browser-dependant.
JavaScript is a client-side html-embedded language while PHP is a
server-side language. PHP is similar in concept to Netscape's
LiveWire Pro product. If you like free fast-moving software that
comes with full source code you will probably like PHP.
� The PostgreSQL support code was written by Adam Sussman
[email protected]
22.1. Major Features
� Standard CGI, FastCGI and Apache module support - As a standard CGI
program, PHP can be installed on any Unix machine running any Unix
web server. With support for the new FastCGI standard, PHP can take
advantage of the speed improvements gained through this mechanism.
As an Apache module, PHP becomes an extremely powerful and
lightning fast alternative to CGI programmimg.
� Access Logging - With the access logging capabilities of PHP, users
can maintain their own hit counting and logging. It does not use
the system's central access log files in any way, and it provides
real-time access monitoring. The Log Viewer Script provides a quick
summary of the accesses to a set of pages owned by an individual
user. In addition to that, the package can be configured to
generate a footer on every page which shows access information. See
the bottom of this page for an example of this.
� Access Control - A built-in web-based configuration screen handles
access control configuration. It is possible to create rules for
all or some web pages owned by a certain person which place various
restrictions on who can view these pages and how they will be
viewed. Pages can be password protected, completely restricted,
logging disabled and more based on the client's domain, browser, e-
mail address or even the referring document.
� PostgresSQL Support - Postgres is an advanced free RDBMS. PHP
supports embedding PostgreSQL "SQL queries" directly in .html
files.
� RFC-1867 File Upload Support - File Upload is a new feature in
Netscape 2.0. It lets users upload files to a web server. PHP
provides the actual Mime decoding to make this work and also
provides the additional framework to do something useful with the
uploaded file once it has been received.
� HTTP-based authentication control - PHP can be used to create
customized HTTP-based authentication mechanisms for the Apache web
server.
� Variables, Arrays, Associative Arrays - PHP supports typed
variables, arrays and even Perl-like associative arrays. These can
all be passed from one web page to another using either GET or POST
method forms.
� Conditionals, While Loops - PHP supports a full-featured C-like
scripting language. You can have if/then/elseif/else/endif
conditions as well as while loops and switch/case statements to
guide the logical flow of how the html page should be displayed.
� Extended Regular Expressions - Regular expressions are heavily used
for pattern matching, pattern substitutions and general string
manipulation. PHP supports all common regular expression
operations.
� Raw HTTP Header Control - The ability to have web pages send
customized raw HTTP headers based on some condition is essential
for high-level web site design. A frequent use is to send a
Location: URL header to redirect the calling client to some other
URL. It can also be used to turn off cacheing or manipulate the
last update header of pages.
� On-the-fly GIF image creation - PHP has support for Thomas
Boutell's GD image library which makes it possible to generate GIF
images on the fly.
� ISP "Safe Mode" support - PHP supports an unique "Safe Mode" which
makes it safe to have multiple users run PHP scripts on the same
server.
� Many more new features are being added in newer releases of PHP.
Visit the main web site at <
http://www.php.net>
� It's Free! - One final essential feature. The package is completely
free. It is licensed under the GNU/GPL which allows you to use the
software for any purpose, commercial or otherwise.
22.2. PHP - Brief History
PHP began life as a simple little cgi wrapper written in Perl. The
name of this first package was Personal Home Page Tools, which later
became Personal Home Page Construction Kit.
A tool was written to easily embed SQL queries into web pages. It was
basically another CGI wrapper that parsed SQL queries and made it easy
to create forms and tables based on these queries. This tool was named
FI (Form Interpreter).
PHP/FI version 2.0 is a complete rewrite of these two packages
combined into a single program. It evolved to a simple programming
language embedded inside HTML files. PHP eliminates the need for
numerous small Perl cgi programs by allowing you to place simple
scripts directly in your HTML files. This speeds up the overall
performance of your web pages since the overhead of forking Perl
several times has been eliminated. It also makes it easier to manage
large web sites by placing all components of a web page in a single
html file. By including support for various databases, it also makes
it trivial to develop database enabled web pages. Many people find the
embedded nature much easier to deal with than trying to create
separate HTML and CGI files.
Now PHP/FI is renamed as PHP.
22.3. So, what can I do with PHP ?
The first thing you will notice if you run a page through PHP is that
it adds a footer with information about the number of times your page
has been accessed (if you have compiled access logging into the
binary). This is just a very small part of what PHP can do for you. It
serves another very important role as a form interpreter cgi, hence
the FI part of the old name. For example, if you create a form on one
of your web pages, you need something to process the information on
that form. Even if you just want to pass the information to another
web page, you will have to have a cgi program do this for you. PHP
makes it extremely easy to take form data and do things with it.
22.4. A simple example
Suppose you have a form:
<FORM ACTION="/cgi-bin/php.cgi/~userid/display.html" METHOD=POST>
<INPUT TYPE="text" name="name">
<INPUT TYPE="text" name="age">
<INPUT TYPE="submit">
<FORM>
Your display.html file could then contain something like:
< ?echo "Hi $ name, you are $ age years old!<p>" >
It's that simple! PHP automatically creates a variable for each form
input field in your form. You can then use these variables in the
ACTION URL file.
The next step once you have figured out how to use variables is to
start playing with some logical flow tags in your pages. For example,
if you wanted to display different messages based on something the
user inputs, you would use if/else logic. In our above example, we can
display different things based on the age the user entered by changing
our display.html to:
<?
if($age>50);
echo "Hi $name, you are ancient!<p>";
elseif($age>30);
echo "Hi $name, you are very old!<p>";
else;
echo "Hi $name.";
endif;
>
PHP provides a very powerful scripting language which will do much
more than what the above simple example demonstrates. See the section
on the PHP Script Language for more information.
You can also use PHP to configure who is allowed to access your pages.
This is done using a built-in configuration screen. With this you
could for example specify that only people from certain domains would
be allowed to see your pages, or you could create a rule which would
password protect certain pages. See the Access Control section for
more details.
PHP is also capable of receiving file uploads from any RFC-1867
compliant web browser. This feature lets people upload both text and
binary files. With PHP's access control and logical functions, you
have full control over who is allowed to upload and what is to be done
with the file once it has been uploaded. See the File Upload section
for more details.
PHP has support for the PostgreSQL database package. It supports
embedded SQL queries in your .HTML files.
PHP also has support for the mysql database package. It supports
embedded SQL queries in your .HTML files.
22.5. CGI Redirection
22.5.1. Apache 1.0.x Notes
A good way to run PHP is by using a cgi redirection module with the
Apache server. Please note that you do not need to worry about
redirection modules if you are using the Apache module version of PHP.
There are two of these redirection modules available. One is developed
by Dave Andersen
�
[email protected]
and it is available at
� <
ftp://ftp.aros.net/pub/util/apache/mod_cgi_redirect.c>
and the other comes bundled with Apache and is called
mod_actions.c. The modules are extremely similar. They differ
slightly in their usage. Both have been tested and both work with
PHP.
Check the Apache documentation on how to add a module. Generally you
add the module name to a file called Configuration. The line to be
added if you want to use the mod_actions module is:
Module action_module mod_actions.o
If you are using the mod_cgi_redirect.c module add this line:
Module cgi_redirect_module mod_cgi_redirect.o
Then compile your httpd and install it. To configure the cgi
redirection you need to either create a new mime type in your
mime.types file or you can use the AddType command in your srm.conf
file to add the mime type. The mime type to be added should be
something like this:
application/x-httpd-php phtml
If you are using the mod_actions.c module you need to add the follow�
ing line to your srm.conf file:
Action application/x-httpd-php /cgi-bin/php.cgi
If you are using mod_cgi_redirect.c you should add this line to
srm.conf:
CgiRedirect application/x-httpd-php /cgi-bin/php.cgi
Don't try to use both mod_actions.c and mod_cgi_redirect.c at the same
time.
Once you have one of these cgi redirection modules installed and
configured correctly, you will be able to specify that you want a file
parsed by PHP simply by making the file's extension .phtml.
Furthermore, if you add index.phtml to your DirectoryIndex
configuration line in your srm.conf file then the top-level page in a
directory will be automatically parsed by php if your index file is
called index.phtml.
22.5.2. Netscape HTTPD
You can automatically redirect requests for files with a given
extension to be handled by PHP by using the Netscape Server CGI
Redirection module. This module is available in the File Archives on
the PHP Home Page. The README in the package explicitly explains how
to configure it for use with PHP.
22.5.3. NCSA HTTPD
NCSA does not currently support modules, so in order to do cgi
redirection with this server you need to modify your server source
code. A patch to do this with NCSA 1.5 is available in the PHP file
archives.
22.6. Running PHP from the command line
If you build the CGI version of PHP, you can use it from the command
line simply typing: php.cgi filename where filename is the file you
want to parse. You can also create standalone PHP scripts by making
the first line of your script look something like:
#!/usr/local/bin/php.cgi -q
The "-q" suppresses the printing of the HTTP headers. You can leave
off this option if you like.
22.7. PHPGem package
PHPGem is a PHP-script which accelerates the creation of PHP-scripts
for working with tables. It works with different SQL-servers such as
PostgreSQL, MySQL, mSQL, ODBC, and Adabas. You input a description of
and parameters for your tables' fields (field name, on/off searching
in the field, etc.), and PHPGem outputs another PHP-script which will
work with the tables (view/add/edit/delete/duplicate entries and
search). PHPGem works with multi-level nested tables. PHPGem allows
you to specify a level of access for each table and for each field for
each user. PHPGem also support images.
PHPGem is at <
http://sptl.org/phpgem>
23. Python Interface for PostgreSQL
Python in an interpreted, object orientated scripting language. It is
simple to use (light syntax, simple and straighforward statements),
and has many extensions for building GUIs, interfacing with WWW, etc.
An intelligent web browser (HotJava like) is currently under
development (november 1995), and this should open programmers many
doors. Python is copyrighted by Stichting S Mathematisch Centrum,
Amsterdam, The Netherlands, and is freely distributable. It contains
support for dynamic loading of objects, classes, modules, and
exceptions. Adding interfaces to new system libraries through C code
is straightforward, making Python easy to use in custom settings.
Python is a very high level scripting language with X interface.
Python package is distributed on Linux cdroms includes most of the
standard Python modules, along with modules for interfacing to the Tix
widget set for Tk.
PyGreSQL is a python module that interfaces to a PostgreSQL database.
It embeds the PostgreSQL query library to allow easy use of the
powerful PostgreSQL features from a Python script. PyGreSQL is
written by D'Arcy J.M. Cain and Pascal Andre.
� New site of PyGreSQL <
http://www.druid.net/pygresql/>
� Maintained by D'Arcy at <
http://www.druid.net/~darcy/>
� Old site is at
<
ftp://ftp.via.ecp.fr/pub/python/contrib/Database/PyGres95.README >
� D'Arcy J.M. Cain
[email protected]
� Pascal Andre
[email protected]
� Pascal Andre
[email protected]
23.1. Where to get PyGres ?
The home sites of the differents packages are:
� Python
<
ftp://ftp.python.org:/pub/www.python.org/1.5/python1.5b2.tar.gz>
� PyGreSQL <
ftp://ftp.druid.net/pub/distrib/PyGreSQL-2.1.tgz>
� Old site
<
ftp://ftp.via.ecp.fr/pub/python/contrib/Database/PyGres95-1.0b.tar.gz
>
You should anyway try to find some mirror site closer of your site.
Refer to the information sources to find these sites. PyGreSQL
should reside in the contrib directories of Python and PostgreSQL
sites.
23.2. Information and support
If you need information about these packages please check their web
sites:
� Python : <
http://www.python.org/>
� PostgreSQL :
<
http://epoch.cs.berkeley.edu:8000/postgres95/index.html>
� PyGreSQL <
ftp://ftp.druid.net/pub/distrib/PyGreSQL-2.1.tgz>
� Old site PyGreSQL :
<
http://www.via.ecp.fr/via/products/pygres.html>
For support :
� Mailing list for PyGreSQL. You can join by sending email to
[email protected] with the line "subscribe pygresql name@domain" in
the body replacing "name@domain" with your own email address.
� Newsgroup for Python : newsgroup comp.lang.python
� PyGreSQL : contact Andre at
[email protected] for bug reports,
ideas, remarks
23.3. Testing Python interface
See the section - ``Testing Python PostgreSQL interface''
24. Gateway between PostgreSQL and the WWW - WDB-P95
24.1. About wdb-p95
WDB-P95 - A Web interface to PostgreSQL Databases was created by J.
Douglas Dunlop It is at
� New WDB from J Rowe is at
<
http://www.lava.net/beowulf/programming/wdb>
� New versions of WWW-WDB is at <
http://www.eol.ists.ca/~dunlop/wdb-
p95/>
� For questions or to join Mailing lists contact
[email protected]
This is a modified version of wdb-1.3a2 which provides a gateway to
a the WWW for PostgreSQL. This version also requires a Browser that
is capable of handling HTML Tables for the tabular output. This is
not required by the original wdb and can be fairly easily reverted.
You can try out CASI Tape and Image Query. You can have a peek at the
Form Definition File (FDF) which is used to create the CASI Tape and
Image Query too, which includes a JOIN of 2 tables.
This release contains all files necessary to install and run WDB-P95
as an interface to your PostgreSQL databases. To port this system to
other database should be relatively easy - provided that it supports
standard SQL and has a Perl interface.
24.2. Does the PostgreSQL server, pgperl, and httpd have to be on the
same host?
No - the PostgreSQL server does not have to be on the same host. As
WDB-P95 is called by the http daemon, they have to be on the same
host. - And as WDB-P95 was written to use Pg.pm - pgperl has to be on
the same host too. Pgperl was written using the libpq library, so it
will be able to access any PostgreSQL server anywhere in the net, just
like any other PostgreSQL client. As illustrated below
(WWW Client (Netscape)) => (HTTP Server (NCSA's http) + WDB-P95 +
pgperl + libpq)=> (PostgreSQL server)
Curly brackets () represent machines.
Each machine can be of a different type : NT, SUN, HP, ... but you
need the libpq interface library for the machine type where you plan
to use WDB-P95, as you need it to compile pgperl. (The system was
designed to use HTML tables so a recent WWW client is best)
25. "C", "C++", ESQL/C language Interfaces and Bitwise Operators for
PostgreSQL
25.1. "C" interface
It is included in distribution and is called 'libpq'. Similar to
Oracle OCI, Sybase DB-lib, Informix CLI libraries.
25.2. "C++" interface
It is included in distribution and is called 'libpq++'. See the
section - ``Testing C and C++ PostgreSQL interface''
25.3. ESQL/C
ESQL/C 'Embedded C Pre-compiler' for PostgreSQL ESQL/C is like Oracle
Pro*C, Informix ESQL/C. The PostgreSQL ESQL/C is an SQL application-
programming interface (API) enables the C programmer to create custom
applications with database-management capabilities. The PostgreSQL
ESQL/C allows you to use a third-generation language with which you
are familiar and still take advantage of the Structured Query Language
(SQL).
ESQL/C consists of the following pieces of software:
� The ESQL/C libraries of C functions provide access to the database
server.
� The ESQL/C header files provide definitions for the data
structures, constants, and macros useful to the ESQL/C program.
� The ESQL/C preprocessor, is a source-code preprocessor that
converts a C file containing SQL statements into an executable
file.
It is at
� ESQL/C for PostgreSQL is already included in the distribution.
� Main site <
ftp://ftp.lysator.liu.se/pub/linus>
� Email :
[email protected]
See the section - ``Testing Embedded SQL/C interface to
PostgreSQL''
To use Vim color editor to edit 'ecpg' files (*.pgc), you must do the
following:-
______________________________________________________________________
bash$ su - postgres
bash$ mkdir $HOME/vim
And create a file '$HOME/vim/myfilestypes.vim' which has these lines
" myfiletypefile
au! BufRead,BufNewFile *.pgc set filetype=esqlc
______________________________________________________________________
You should have $HOME/.gvimrc file. If not create one, refer to Vim
howto doc at <
http://metalab.unc.edu/LDP/HOWTO/Vim-HOWTO.html> Put the
following line in $HOME/.gvimrc file
______________________________________________________________________
let myfiletypefile = "~/vim/myfiletypes.vim"
______________________________________________________________________
Now, if you edit with
______________________________________________________________________
bash$ gvim sample.pgc
______________________________________________________________________
you will get the color syntax highlighted.
25.4. BitWise Operators for PostgreSQL
Bitwise operators was written by Nicolas Moldavsky
�
[email protected]
"C" functions that implement bitwise operators (AND, OR, XOR, bit
complement) on pgsql. Get them by anonymous FTP from
� <
ftp://ftp.overnet.com.ar/pub/utils/linux/bitpgsql.tgz>
Makefile for Linux is included.
26. Japanese Kanji Code for PostgreSQL
It is at the following site
� <
ftp://ftp.sra.co.jp/pub/cmd/postgres/>
27. PostgreSQL Port to Windows 95/Windows NT
PostgreSQL binaries for Windows NT is available from :
� Windows NT PostgreSQL binaries <
http://www.askesis.nl>
� <
http://www.postgresql.org>
Download the binaries and unpack and follow instructions in
``Install PostgreSQL'' from step 13.
If you want to re-compile the source tree then follow the instructions
given below. Porting to NT is done using Cygnus cygwin32 package
which has gcc, gmake for Win NT/95.
� Cygwin 32 package is at <
http://www.cygnus.com/misc/gnu-win32>
At this site and get the file cdk.exe (self-extractor file for gnu-
win32)
27.1. Authors of NT port
The authors of Windows NT port of PostgreSQL are -
� Daniel Horak
[email protected]
� Joost Kraaijeveld
[email protected]
� Kevin Lo
[email protected]
� Home page of NT port is at
<
http://www.freebsd.org/~kevlo/postgres/portNT.html>
27.2. Install the Cygwin package
1. Download
<
ftp://go.cygnus.com/pub/sourceware.cygnus.com/cygwin/latest/full.exe>
2. Run full.exe and install in c:\Unix\Root directory.
3. Run Cygwin, Type 'mount --help' for docs. You can use -f switch to
force mount. And then run "umount / " and "mount c:\Unix\Root /"
27.3. Tuneup Bash Window
After installing the Cygwin package, do the following to setup the
working environment:
1. Install the Vi editor 'Vim'. See
<
http://metalab.unc.edu/LDP/HOWTO/Vim-HOWTO.html>
2. The default window of cygwin bash is black-background window with
24 lines. To set the background color and size of bash window, click
on NT-Start->Control-panel->MS DOS console and change the background
color to grey and size to 70 lines.
(OR) right click on Window titlebar and change property.
3. Edit cygnus.bat in c:\cygnus\cywinb20 and set the following -
______________________________________________________________________
set HOME=c:\cygnus\cygwinb20
bash --login
______________________________________________________________________
And also edit the /.bash_profile and put these lines
______________________________________________________________________
set -o vi
PATH=$PATH:/usr/local/bin:/usr/bin
export PATH
______________________________________________________________________
4. To enable the command-line history editing give -
bash$ set -o vi
Using the l,k,j,h you can use the vi commands to edit the command line
history commands. You can repeat or modify previous commands, saves
typing time.
5. You can do mount of drives/directories using this command -
______________________________________________________________________
bash$ umount /
bash$ mount "c:\cygnus" /
bash$ mount "c:\cygnus\cygwin-b20\postgres" /usr/local/pgsql
______________________________________________________________________
6. See online help with -
______________________________________________________________________
bash$ mount --help
bash$ ls --help
______________________________________________________________________
27.4. Install the Andy Piper tools
1. Go to <
ftp://ftp.xemacs.org/pub/xemacs/aux/> and download cygwin-
b20-local.tar.bz2 in the c:/Unix/Root directory.
2. cd c:/Unix/Root; bunzip2 cygwin-b20-local.tar.bz2
3. tar -xvf cygwin-b20-local.tar
4. cd /local/bin; sh check_cygwin_setup.sh
5. After doing step 4, you see the following message:
___________________________________________________________________
You don't have /bin would you like to mount cygwin as /bin?"
[ y/n ]
Select 'n', and the other options are selected 'y'
___________________________________________________________________
6. mount c:/Unix/Root/cygwin-b20/H-i586-cygwin32/i586-cygwin32/bin
/bin
7. cd c:/Unix/Root/cygwin-b20/H-i586-cygwin32/i586-cygwin32; mkdir
libexec share man etc sbin info
8. cp -R /local/{ bin,libexec,share,man,etc,sbin,info,include }
27.5. Install Ludovic Lange's Cygwin32 IPC package
1. Go to <
http://www.multione.capgemini.fr/tools/pack_ipc> and
download cygwin32_ipc-1.03.tgz in c:/Unix/Root directory.
2. tar -zxvf cygwin32_ipc-1.03.tgz
3. cd cygwin32_ipc-1.03/src and run 'make'
4. mkdir -p c:/usr/local/{bin,include,lib,include/sys}
___________________________________________________________________
cp /cygwin32_ipc-1.03/bin/* c:/usr/local/bin
cp /cygwin32_ipc-1.03/include/sys/* c:/usr/local/include/sys
cp /cygwin32_ipc-1.03/lib/* c:/usr/local/lib
cp c:/usr/local/bin/* /bin
cp c:/Unix/Root/cygwin-b20/H-i586-cygwin32/bin/* /bin
___________________________________________________________________
5. mount c:/usr/local/bin /usr/local/bin
___________________________________________________________________
mount c:/usr/local/include /usr/local/include
mount c:/usr/local/lib /usr/local/lib
cp /local/lib/* /usr/local/lib
___________________________________________________________________
27.6. Install PostgreSQL
1. Download the latest PostgreSQL source code
2. Postgres treats all files as binary files so the lf/cf stuff
appeard, so we do steps 2, 3, 4, and 5:
___________________________________________________________________
mkdir -p c:/Postgres/{Source,Binary}
mkdir c:/Postgres/Binary/pgsql
mkdir -p /usr/src/pgsql
mkdir -p /usr/local/pgsql
___________________________________________________________________
3. Copy Postgres source code to c:/Postgres/Source directory, then tar
-zxvf postgresql-6.5.3.tar.gz
4. mv postgresql-6.5.3 pgsql
5. Mount directories now -
___________________________________________________________________
mount -b c:/Postgres/Binary/pgsql /usr/local/pgsql
mount c:/Postgres/Source/pgsql /usr/src/pgsql
mount c:/Unix/Root/cygwin-b20/share /sw/cygwin-b20/share
___________________________________________________________________
6. mkdir -p /usr/local/pgsql/{bin,include,lib,data}
7. cd /usr/src/pgsql/src/win32
8. Copy header files -
___________________________________________________________________
cp un.h c:/Unix/Root/cygwin-b20/H-i586-cygwin32/i586-cygwin32/include/sys
cp endian.h c:/Unix/Root/cygwin-b20/H-i586-cygwin32/i586-cygwin32/include
cp tcp.h c:/Unix/Root/cygwin-b20/H-i586-cygwin32/i586-cygwin32/include/netinet
___________________________________________________________________
9. ln -s /usr/local/lib /usr/src/pgsql/src/backend/libpostgres.a
10.
cd /usr/src/pgsql/src, then run './configure'
11.
make > make.txt 2>&1
12.
make install > make.install.txt 2>&1
13.
cp /usr/local/pgsql/lib/pq.dll /usr/local/pgsql/bin
14.
After the make install you had to change all the text files in the
bin and lib diectories so that they did not contain cr/lf and eof
stuff.
15.
Using any editor to create .bashrc in / directory as belows:
___________________________________________________________________
PATH=$PATH:/usr/local/pgsql/bin:/usr/local/bin
PGDATA=/usr/local/pgsql/data
PGLIB=/usr/local/pgsql/lib
LD_LIBRARY_PATH=/usr/local/pgsql/lib:/usr/local/lib
export LD_LIBRARY_PATH PATH PGDATA PGLIB
___________________________________________________________________
16.
source /.bashrc, then run 'initdb --username=xxxx' Note that the
owner of the DB system have to be different from root/administrator
17.
Edit the file /usr/local/pgsql/data/pg_hba.conf, such as:
___________________________________________________________________
host all 163.17.11.109 255.255.255.0 trust
___________________________________________________________________
18.
ipc-daemon.exe&
19.
postmaster -i&
20.
Run ' psql -h host_name template1'
28. Mailing Lists
28.1. E-mail account for PostgreSQL
Get free e-mail accounts from
� In Yahoo <
http://www.yahoo.com> click on e-mail
� In Lycos <
http://www.lycos.com> click on new e-mail accounts
� In hotmail <
http://www.hotmail.com> click on new e-mail accounts
Subscribe to PostgreSQL mailing list and Yahoo has additional
feature of creating a seperate folder for PostgreSQL e-mails, so
that your regular e-mail is not cluttered. Select menu Email- >
Options- > Filters and pick seperate folder for email. With this
e-mail account you can access mail from anywhere in the world as
long as you have access to a web page.
If you have any other e-mail, you can use "Mail Filters" to receive
automatically the PostgreSQL mails into a seperate folder. This will
avoid mail cluttering.
28.2. English Mailing List
See the Mailing Lists Item on the main web page at :
� <
http://www.postgresql.org/>
� Email questions to:
[email protected]
� Developers
[email protected]
� Port specific questions
[email protected]
� Documentation questions
[email protected]
You will get the answers/replies back by e-mail in less than a day.
You can also subscribe to mailing lists. To subscribe or unsubscribe
from the list, send mail to
�
[email protected]
�
[email protected]
�
[email protected]
�
[email protected]
The body of the message should contain the single line
subscribe
(or)
unsubscribe
28.3. Archive of Mailing List
Also mailing lists are archived in html format at the following
location -
� Date-wise listing available via MHonarc via the WWW at
<
http://www.postgresql.org/mhonarc/pgsql-questions>
� <
ftp://ftp.postgresql.org> directory is /pub/majordomo
There is also search engine available on the PostgreSQL main web
site specifically for pgsql questions.
28.4. Spanish Mailing List
Now there is an "unofficial" list of postgreSQL in Spanish. To
subscribe the user has to send a message to:
�
[email protected]
The body of the message should contain the single line:
inscripcion pgsql-ayuda
29. Documentation and Reference Books
29.1. User Guides and Manuals
The following are included in the PostgreSQL distribution in the
postscript, HTML formats and unix man-pages. They are located in
/usr/doc/postgresql* directory. If you have access to internet, you
can find the documents listed below at
<
http://www.postgresql.org/docs> and at
<
http://www.postgresql.org/users-lounge/docs>.
� "Installation Guide"
� "User Guide" for PostgreSQL
� "Implementation Guide" detailing database internals of PostgreSQL.
� Online manuals.
� Online manuals in HTML formats.
� Also manuals in Postscript format for printing hard copies.
29.2. Online Documentation
� Listing and description of default data types and operators
Is a part of PSQL command
� Listing of supported SQL keywords
There is a script in the /tools directory in source code tree.
� Listings of supported statements -
Use the command psql \h
� Basic relational database concepts under PostgreSQL
(implementation) and several online examples (queries) -
Look at the regression tests at src/test. There you can find the directories
regress/sql and suite/*.sql and also see
<ref id="Examples RPM">
� Tutorial for PostgreSQL.
SQL tutorial scripts is in the directory src/tutorial
See also "SQL Tutorial for beginners" in Appendix B of this document
``''
29.3. Useful Reference Textbooks
� "Understanding the New SQL: A Complete Guide" - by Jim Melton and
Alan R.Simon
Morgan Kaufman Publisher is one of best SQL books. This deals with SQL92.
� "A Guide to THE SQL STANDARD" - by C.J.Date
Addison-Wesley Publishing company is also a good book. Very popular book for SQL.
� SQL - The Standard Handbook, November 1992
Stephen Cannan and Gerard Otten
McGraw-Hill Book Company Europe , Berkshire, SL6 2QL, England
� SQL Instant Reference, 1993
Martin Gruber, Technical Editor: Joe Celko
SYBEX Inc. 2021 Challenger Drive Alameda, CA 94501
� C.J.Date, "An introduction to Database Systems" (6th Edition),
Addison-Wesley, 1995, ISBN 0-201-82458-2
This book is the Bible of Database Management Systems.
The book details normalization, SQL, recovery, concurrency, security,
integrity, and extensions to the original relational model, current issues
like client/server systems and the Object Oriented model(s). Many
references are included for further reading. Recommended for most users.
� Stefan Stanczyk, "Theory and Practice of Relational Databases", UCL
Press Ltd, 1990, ISBN 1-857-28232-9
Book details theory of relational databases, relational algebra, calculus
and normalisation. But it does not cover real world issues and examples
beyond simple examples. Recommended for most users.
� "The Practical SQL Handbook" Third Edition, Addison Wesley
Developers Press ISBN 0-201-44787-8
Recommended for most users.
� Michael Stonebraker, "Readings in Database Systems", Morgan
Kaufmann, 1988, ISBN 0-934613-65-6
This book is a collection of papers that have been published over the
years on databases. It's not for the casual user but it is really a
reference for advanced (post-graduate) students or database system
developers.
� C.J.Date, "Relational Database - Selected Readings", Addison-
Wesley, 1986, ISBN 0-201-14196-5
This book is a collection of papers that have been published over the
years on databases. It's not for the casual user but it is really a
reference for advanced (post-graduate) students or database system
developers.
� Nick Ryan and Dan Smith, "Database Systems Engineering",
International Thomson Computer Press, 1995, ISBN 1-85032-115-9
This book goes into the details of access methods, storage techniques.
� Bipin C. Desai, "An introduction to Database Systems", West
Publishing Co., 1990, ISBN 0-314-66771-7
It's not for the casual user but it is for advanced (post-graduate)
students or database system developers.
� Joe Celko "INSTANT SQL Programming"
Wrox Press Ltd.
Unit 16, 20 James Road, Tyseley
Birmingham, B11 2BA, England
1995
� Michael Gorman "Database Management Systems: Understanding and
Applying Database"
Technology
QED and John Wiley
1991
� Michael Gorman "Enterprise Database for a Client/Server
Environment" QED and John Wiley
Presents the requirements of building client/server database
applications via repository metamodels and the use of ANSI standard SQL
1993
Hundreds of other titles on SQL are available! Check out a bookstore.
29.4. ANSI/ISO SQL Specifications documents - SQL 1992, SQL 1998
ANSI/ISO SQL specifications documents can be found at these sites
listed below -
� <
http://www.naiua.org/std-orgs.html>
� <
http://www.ansi.org/docs> and click on file cat_c.html and search
with "Database SQL"
� SQL92 standard <
http://www.jcc.com> and click on file
sql_stnd.html
� ANSI/ISO SQL specifications
<
http://www.contrib.andrew.cmu.edu/~shadow/sql.html> You will find
SQL Reference here.
29.5. Syntax of ANSI/ISO SQL 1992
See Appendix A of this document ``''
29.6. Syntax of ANSI/ISO SQL 1998
The SQL 1998 (SQL 3) specification is still under development. See
'Electronic Access to the SQL3 Working Draft' of this document at ``''
29.7. SQL Tutorial for beginners
See Appendix B of this document ``''
29.8. Temporal Extension to SQL92
� Document for Temporal Extension to SQL-92
<
ftp://FTP.cs.arizona.edu/tsql/tsql2/>
� Temporal SQL-3 specification
<
ftp://FTP.cs.arizona.edu/tsql/tsql2/sql3/>
This directory contains the language specification for a temporal
extension to the SQL-92 language standard. This new language is
designated TSQL2.
The language specification present here is the final version of the
language.
Correspondence may be directed to the chair of the TSQL2 Language
Design Committee, Richard T.Snodgrass, Department of Computer Science,
University of Arizona, Tucson, AZ 85721,
�
[email protected]
The affiliations and e-mail addresses of the TSQL2 Language Design
Committee members may be found in a separate section at the end of
the language specification.
The contents of this directory are as follows.
spec.dvi,.ps TSQL2 Language Specification, published in September,
1994
bookspec.ps TSQL2 Language Specification, as it appears in the
TSQL2 book, published in September, 1995 (see below).
sql3 change proposals submitted to the ANSI and ISO SQL3
committees.
Associated with the language specification is a collection of
commentaries which discuss design decisions, provide examples, and
consider how the language may be implemented. These commentaries were
originally proposals to the TSQL2 Language Design Committee. They now
serve a different purpose: to provide examples of the constructs,
motivate the many decisions made during the language design, and
compare TSQL2 with the many other language proposals that have been
made over the last fifteen years. It should be emphasized that these
commentaries are not part of the TSQL2 language specification per se,
but rather supplement and elaborate upon it. The language
specification proper is the final word on TSQL2.
The commentaries, along with the language specification, several
indexes, and other supporting material, has been published as a book:
Snodgrass, R.T., editor, The TSQL2 Temporal Query Language, Kluwer
Academic Publishers, 1995, 674+xxiv pages.
The evaluation commentary appears in the book in an abbreviated form;
the full commentary is provided in this directory as file eval.ps
The file tl2tsql2.pl is a prolog program that tranlates allowed
temporal logic to TSQL2. This program was written by Michael Boehlen
�
[email protected]
He may be contacted for a paper that describes this translation.
This is a rather dated version of that program. Newer versions are
available at
� <
http://www.cs.auc.dk/general/DBS/tdb/TimeCenter/Software>
(the TimeDB and Tiger systems).
29.9. Part 0 - Acquiring ISO/ANSI SQL Documents
This document shows you how to (legally) acquire a copy of the SQL-92
standard and how to acquire a copy of the "current" SQL3 Working
Draft.
The standard is copyrighted ANSI standard by ANSI, the ISO standard by
ISO.
There are two (2) current SQL standards, an ANSI publication and an
ISO publication. The two standards are word-for-word identical except
for such trivial matters as the title of the document, page headers,
the phrase "International Standard" vs "American Standard", and so
forth.
Buying the SQL-92 Standard
The ISO standard, ISO/IEC 9075:1992, Information Technology - Database
Languages - SQL, is currently (March, 1993) available and in stock
from ANSI at:
American National Standards Institute
1430 Broadway
New York, NY 10018 (USA)
Phone (sales): +1.212.642.4900
at a cost of US$230.00. The ANSI version, ANSI X3.135-1992, American
National Standard for Information Systems - Database Language SQL, was
not available from stock at this writing, but was expected to be
available by some time between late March and early May, 1993). It is
expected to be be priced at US$225.00.
If you purchase either document from ANSI, it will have a handling
charge of 7% added to it (that is, about US$9.10). Overseas shipping
charges will undoubtedly add still more cost. ANSI requires a hardcopy
of a company purchase order to accompany all orders; alternately, you
can send a check drawn on an US bank in US dollars, which they will
cash and clear before shipping your order. (An exception exists: If
your organization is a corporate member of ANSI, then ANSI will ship
the documents and simply bill your company.)
The ISO standard is also available outside the United States from
local national bodies (country standardization bodies) that are
members of either ISO (International Organization for Standardization)
or IEC (International Electrotechnical Commission). Copies of the list
of national bodies and their addresses are available from ANSI or from
other national bodies. They are also available from ISO:
International Organization for Standardization
Central Secretariat
1, rue de Varembi
CH-1211 Genhve 20
Switzerland
If you prefer to order the standard in a more convenient and quick
fashion, you'll have to pay for the privilege. You can order ISO/IEC
9075:1992, Information Technology - Database Languages - SQL, from:
Global Engineering Documents
2805 McGaw Ave
Irvine, CA 92714 (USA)
USA
Phone (works from anywhere): +1.714.261.1455
Phone (only in the USA): (800)854-7179
for a cost of US$308.00. I do not know if that includes shipping or
not, but I would guess that international shipping (at least) would
cost extra. They will be able to ship you a document fairly quickly
and will even accept "major credit cards". Global does not yet have
the ANSI version nor do they have a price or an expected date (though
I would expect it within a few weeks following the publication by ANSI
and at a price near US$300.00).
Buying a copy of the SQL3 Working Draft
You can purchase a hardcopy of the SQL3 working draft from the ANSI X3
Secretariat, CBEMA (Computer and Business Equipment Manufacturers
Association). They intend to keep the "most recent" versions of the
SQL3 working draft available and sell them for about US$60.00 to
US$65.00. You can contact CBEMA at:
CBEMA, X3 Secretariat
Attn: Lynn Barra
1250 Eye St.
Suite 200
Washington, DC 20005 (USA)
Lynn Barra can also be reached by telephone at +1.202.626.5738 to
request a copy, though mail is probably more courteous.
Electronic Access to the SQL3 Working Draft
The most recent version (as of the date of this writing) of the SQL3
(both ANSI and ISO) working draft (and all of its Parts) is available
by "anonymous ftp" or by "ftpmail" on:
gatekeeper.dec.com
at
/pub/standards/sql/
In this directory are a number of files. There are PostScript. files
and "plain text" (not prettily formatted, but readable on a screen
without special software).
In general, you can find files with names like:
sql-bindings-mar94.ps
sql-bindings-mar94.txt
sql-cli-mar94.ps
sql-cli-mar94.txt
sql-foundation-mar94.ps
sql-foundation-mar94.txt
sql-framework-mar94.ps
sql-framework-mar94.txt
sql-psm-mar94.ps
sql-psm-mar94.txt
As new versions of the documents are produced, the "mar94" will change
to indicate the new date of publication (e.g., "aug94" is the expected
date of the next publication after "mar94").
In addition, for those readers unable to get a directory listing by
FTP, we have placed a file with the name:
ls
into the same directory. This file (surprise!) contains a directory
listing of the directory.
Retrieving Files Directly Using ftp
This is a sample of how to use FTP. Specifically, it shows how to
connect to gatekeeper.dec.com, get to the directory where the base
document is kept, and transfer the document to your host. Note that
your host must have Internet access to do this. The login is 'ftp' and
the password is your email address (this is sometimes referred to as
bits are stripped from the file(s) received. 'get' gets one file at a
time. Comments in the script below are inside angle brackets < like so
> .
% ftp gatekeeper.dec.com
Connected to gatekeeper.dec.com.
220- *** /etc/motd.ftp ***
Gatekeeper.DEC.COM is an unsupported service of DEC Corporate Research.
<...this goes on for a while...>
220 gatekeeper.dec.com FTP server (Version 5.83 Sat ... 1992) ready.
Name (gatekeeper.dec.com:<yourlogin here>): ftp <anonymous also works>
331 Guest login ok, send ident as password.
Password: <enter your email address here >
230 Guest login ok, access restrictions apply.
Remote system type is UNIX. <or whatever>
Using binary mode to transfer files.
ftp> cd pub/standards/sql
250 CWD command successful.
ftp> dir
200 PORT command successful.
150 Opening ASCII mode data connection for /bin/ls.
total 9529
-r--r--r-- 1 root system 357782 Feb 25 10:18 x3h2-93-081.ps
-r--r--r-- 1 root system 158782 Feb 25 10:19 x3h2-93-081.txt
-r--r--r-- 1 root system 195202 Feb 25 10:20 x3h2-93-082.ps
-r--r--r-- 1 root system 90900 Feb 25 10:20 x3h2-93-082.txt
-r--r--r-- 1 root system 5856284 Feb 25 09:55 x3h2-93-091.ps
-r--r--r-- 1 root system 3043687 Feb 25 09:57 x3h2-93-091.txt
226 Transfer complete.
ftp> type binary
200 Type set to I.
ftp> get x3h2-93-082.txt
200 PORT command successful.
150 Opening BINARY mode data connection for x3h2-93-082.txt (90900 bytes).
226 Transfer complete.
90900 bytes received in 0.53 seconds (166.11 Kbytes/s)
ftp> quit
% <the file is now in your directory as x3h2-93-082.txt>
Retrieving Files Without Direct ftp Support
Digital Equipment Corporation, like several other companies, provides
ftp email service. The response can take several days, but it does
provide a service equivalent to ftp for those without direct Internet
ftp access. The address of the server is:
[email protected]
The following script will retrieve the PostScript for the latest
version of the SQL3 document:
reply
[email protected]
connect gatekeeper.dec.com anonymous
binary
compress
The following script will retrieve the PostScript for the latest ver�
sion of the SQL3 document:
reply
[email protected]
connect gatekeeper.dec.com anonymous
binary
compress
uuencode
chdir /pub/standards/sql
get x3h2-93-091.ps
quit
The first line in the script commands the server to return the
requested files to you; you should replace "joe.programmer@imaginary-
corp.com" with your Internet address. The file in this example,
x3h2-93-091.ps, is returned in "compress"ed "uuencode"d format as 34
separate email messages. If your environment does not provide tools
for reconstructing such files, then you could retrieve the file as
plain text with the following script:
reply
[email protected]
connect gatekeeper.dec.com anonymous
chdir /pub/standards/sql
get x3h2-93-091.ps
quit
But be warned, the .ps file will probably be sent to you in more than
70 parts!
To retrieve any particular file, other than x3h2-93-091.ps, simply
replace "x3h2-93-091.ps" with the name of the desired file. To get a
directory listing of all files available, replace "get x3h2-93-091.ps"
with "dir".
29.10. Part 1 - ISO/ANSI SQL Current Status
This chapter is a source of information about the SQL standards
process and its current state.
Current Status:
Development is currently underway to enhance SQL into a
computationally complete language for the definition and management of
persistent, complex objects. This includes: generalization and
specialization hierarchies, multiple inheritance, user defined data
types, triggers and assertions, support for knowledge based systems,
recursive query expressions, and additional data administration tools.
It also includes the specification of abstract data types (ADTs),
object identifiers, methods, inheritance, polymorphism, encapsulation,
and all of the other facilities normally associated with object data
management.
In the fall of 1996, several parts of SQL3 went through an ISO CD
ballot. Those parts were SQL/Framework, SQL/Foundation, and
SQL/Bindings. Those ballots failed (as expected) with 900 or so
comments. In Late January, there was an ISO DBL editing meeting that
processed a large number of problem solutions that were either
included with ballot comments or submitted as separate papers. Since
the DBL editing meeting was unable to process all of the comments, the
editing meeting has been extended. The completion of the editing
meeting is scheduled for the end of July, 1997, in London.
Following the July editing meeting, the expectation is that a Final CD
ballot will be requested for these parts of SQL. The Final CD process
will take about 6 months and a DBL editing meeting, after which there
will be a DIS ballot and a fairly quick IS ballot.
The ISO procedures have changed since SQL/92, so the SQL committees
are still working through the exact details of the process.
If everything goes well, these parts of SQL3 will become an official
ISO/IEC standard in late 1998, but the schedule is very tight.
In 1993, the ANSI and ISO development committees decided to split
future SQL development into a multi-part standard. The Parts are:
� Part 1: Framework A non-technical description of how the document
is structured.
� Part 2: Foundation The core specification, including all of the new
ADT features.
� Part 3: SQL/CLI The Call Level Interface.
� Part 4: SQL/PSM The stored procedures specification, including
computational completeness.
� Part 5: SQL/Bindings The Dynamic SQL and Embedded SQL bindings
taken from SQL-92.
� Part 6: SQL/XA An SQL specialization of the popular XA Interface
developed by X/Open
� Part 7:SQL/TemporalAdds time related capabilities to the SQL
standards.
In the USA, the entirety of SQL3 is being processed as both an ANSI
Domestic ("D") project and as an ISO project. The expected time frame
for completion of SQL3 is currently 1999.
The SQL/CLI and SQL/PSM are being processed as fast as possible as
addendums to SQL-92. In the USA, these are being processed only as
International ("I") projects. SQL/CLI was completed in 1995. SQL/PSM
should be completed sometime in late 1996.
In addition to the SQL3 work, a number of additional projects are
being persued:
� SQL/MM An ongoing effort to define standard multi-media packages
using the SQL3 ADT capabilities.
� Remote Data Access (RDA)
Standards Committee and Process
There are actually a number of SQL standards committees around the
world. There is an international SQL standards group as a part of
ISO. A number of countries have committees that focus on SQL. These
countries (usually) send representatives to ISO/IEC JTC1/SC 21/WG3 DBL
meetings. The countries that actively participate in the ISO SQL
standards process are:
� Australia
� Brazil
� Canada
� France
� Germany
� Japan
� Korea
� The Netherlands
� United Kingdom
� United States
NIST Validation
SQL implementations are validated (in the Unites States) by the
National Institute of Standards and Training (NIST). NIST currently
has a validation test suite for entry level SQL-92. The exact details
of the NIST validation requirements are defined as a Federal
Information Processing Standard (FIPS). The current requirements for
SQL are defined in FIPS 127-2. The Postscript and Text versions of
this document can be retrieved from NIST. The current SQL Validated
Products List can also be retrieved from NIST.
Standard SQL Publications and Articles
There are two versions of the SQL standard. Both are available from
ANSI:
� ISO/IEC 9075:1992, "Information Technology --- Database Languages
--- SQL"
� ANSI X3.135-1992, "Database Language SQL"
The two versions of the SQL standard are identical except for the
front matter and references to other standards. Both versions are
available from:
American National Standards Institute
1430 Broadway
New York, NY 10018
USA
Phone (sales): +1.212.642.4900
In additon to the SQL-92 standard, there is now a Technical Corrigen�
dum (bug fixes):
* Technical Corrigendum 1:1994 to ISO/IEC 9075:1992
TC 1 should also be available from ANSI. There is only an ISO version
of TC 1 -- it applies both to the ISO and ANSI versions of SQL-92.
In addition to the standards, several books have been written about
the 1992 SQL standard. These books provide a much more readable
description of the standard than the actual standard.
Related Standards
A number of other standards are of interest to the SQL community. This
section contains pointers to information on those efforts. These
pointers will be augmented as additional information becomes available
on the web.
� SQL Environments (FIPS 193)
� Next Generation Repository Systems (X3H4) - a News Release calling
for particpation in "Developing Standards for the Next Generation
Repository Systems."
29.11. Part 2 - ISO/ANSI SQL Foundation
A significant portion of the SQL3 effort is in the SQL Foundation
document:
� Base SQL/PSM capabilities (moved form SQL/PSM-92)
� New data types
� Triggers
� Subtables
� Abstract Data Types (ADT)
� Object Oriented Capabilities
There are several prerequisites to the object oriented capabilities:
� Capability of defining complex operations
� Store complex operations in the database
� External procedure calls � Some operations may not be in SQL, or
may require external interactions
These capabilities are defined as a part of SQL/PSM
A great deal of work is currently being done to refine the SQL-3
object model and align it with the object model proposed by ODMG. This
effort is described in the X3H2 and ISO DBL paper: Accomodating SQL3
and ODMG. A recent update on the SQL3/OQL Merger is also available.
SQL3 Timing
Work on SQL3 is well underway, but the final standards is several
years away.
� International ballot to progress SQL3 Foundation from Working Draft
to Committee Draft (CD) taking place fall, 1996.
� Ballot is expected to generate numerous comments
� A second CD ballot is likely to be required
� Draft International Standard ballot is likely to be take place in
mid 1998
� International Standard could be completed by mid 1999.
The ANSI version of the standard will be on a similar schedule.
29.12. Part 3 - ISO/ANSI SQL Call Level Interface
The SQL/CLI is a programing call level interface to SQL databases. It
is designed to support database access from shrink-wrapped
applications. The CLI was originally created by a subcommittee of the
SQL Access Group (SAG). The SAG/CLI specification was published as
the Microsoft Open DataBase Connectivity (ODBC) specification in 1992.
In 1993, SAG submitted the CLI to the ANSI and ISO SQL committees.
(The SQL Access Group has now merged with X/Open consortium.)
SQL/CLI provides an international standard for:
� Implementation-independent CLI to access SQL databases
� Client-server tools can easily access database through dynamic Link
Libraries
� Supports and encourages rich set of Client-server tools
SQL/CLI Timing
For the standards process, SQL/CLI is being processed with blinding
speed.
� SQL/CLI is an addendum to 1992 SQL standard (SQL-92)
� Completed as an ISO standard in 1995
� ISO/IEC 9075-3:1995 Information technology -- Database languages --
SQL -- Part 3: Call-Level Interface (SQL/CLI)
� Current SQL/CLI effort is adding support for SQL3 features
29.13. Part 4 - ISO/ANSI SQL Persistent Stored Modules
SQL/PSM expands SQL by adding:
� Procedural language extensions
� Multi-statement and Stored Procedures
� External function and procedure calls
In addition to being a valuable application development tool, SQL/PSM
provides the foundation support for the object oriented capabilities
in SQL3.
Multi-statement and Stored Procedures
Multi-statement and stored procedures offer a variety of advantages in
a client/server environment:
� Performance - Since a stored procedure can perform multiple SQL
statements, network interaction with the client are reduced.
� Security - An user can be given the right to call a stored
procedure that updates a table or set of tables but denied the
right to update the tables directly
� Shared code - The code in a stored procedure does not have to be
rewritten and retested for each client tool that accesses the
database.
� Control - Provides a single point of definition and control for
application logic.
Procedural Language Extensions
Procedural language add the power of a traditional programming
language to SQL through flow control statements and a variety of other
programming constructs.
Flow Control Statements
� If-then-else
� Looping constructs
� Exception handling
� Case statement
� Begin-End blocks
The procedural language extensions include other programming language
constructs:
� Variable declarations
� Set statements for value assignment
� Get diagnostics for process and status information
In addition, all of the traditional SQL statements can be included in
multi-statement procedures.
External Procedure and Function Calls
One feature frequently mentioned in the wish lists for many database
products, and implemented in some, is a capability augmenting the
built-in features with calls to user-written procedures external to
the database software.
� Allows a particular site or application to add their own database
functions
� Can be used throughout the database applications
The benefit of this capability is that it gives the database (and
therefore database applications) access to a rich set of procedures
and functions too numerous to be defined by a standards committee.
SQL/PSM Timing
SQL/PSM is proceeding quickly:
� SQL/PSM is an addendum to SQL-92
� International ballot to progress SQL/PSM from a Draft International
Standard to an International Standard ended January, 1996.
� Editing meeting in May, 1996 did not resolve all of the comments
� Continuation of PSM Editing meeting is scheduled for September 30
through October 4, 1996
� The schedule is tight but there is a chance that PSM will be
published with a 1996 date.
� The official designation will be: ISO/IEC DIS 9075-4:199?
Information technology -- Database languages -- SQL -- Part 4: SQL
Persistent Stored Modules (SQL/PSM)
� Work is well underway on adding SQL/PSM support for SQL3 features.
29.14. Part 5 - ISO/ANSI SQL/Bindings
For ease of reference, the programming language bindings have been
pulled out into a separate document. The current version is simply an
extract of the dynamic and embedded bindings from SQL-92.
A variety of issues remain unresolved for the programming language
bindings.
For traditional programming language, mappings exist for the SQL-92
datatypes. However, mappings must be defined between SQL objects and
programming language variables.
For object oriented languages, mapping must be defined for the current
SQL datatypes and between the SQL object model and the object model of
the object-oriented language.
The object model needs to stabilize before these can be addressed.
The language bindings will be completed as a part of SQL3.
29.15. Part 6 - ISO/ANSI SQL XA Interface Specialization (SQL/XA)
This specification would standardize an application program interface
(API) between a global Transaction Manager and an SQL Resource
Manager. It would standardize the function calls, based upon the
semantics of ISO/IEC 10026, "Distributed Transaction Processing", that
an SQL Resource Manager would have to support for two-phase commit.
The base document is derived from an X/Open publication, with X/Open
permission, that specifies explicit input and output parameters and
semantics, in terms of SQL data types, for the following functions:
xa_close, xa_commit, xa_complete, xa_end, xa_forget, xa_open,
xa_prepare, xa_recover, xa_rollback, and xa_start.
ISO is currently attempting to fast-track the X/Open XA specification.
The fast-track process adopts a current industry specification with no
changes. The XA fast-track ballot at the ISO SC21, JTC 1 level
started on April 27, 1995 and ends on October 27, 1995. If the XA
specification is approved by 75% of the votes, and by 2/3 of the p-
members of JTC 1, it will become an International Standard. If the
fast-track ballot is approved, SQL/XA could become a standard in 1996.
29.16. Part 7 - ISO/ANSI SQL Temporal
Temporal SQL deals with time-related data. The concept is that it is
useful to query data to discover what it looked like at a particular
point in time. Temporal SQL is a December, 1994 paper by Rick
Snodgrass describing the concepts.
X3 Announces the Approval of a New Project, ISO/IEC 9075 Part 7:
SQL/Temporal is a press release related to SQL/Temporal.
----------------------------------------------------------------------------
Temporal SQL
************
Rick Snodgrass (chair of the TSQL2 committee)
31-Dec-1994
Several people have questioned the need for additional support for
time in SQL3 (as proposed by DBL RIO-75, requesting a new part of SQL
to support temporal databases). The claim is that abstract data types
(ADT's) are sufficient for temporal support. In this informational
item, I argue, using concrete examples, that using columns typed with
abstract data types is inadequate for temporal queries. In particular,
many common temporal queries are either difficult to simulate in SQL,
or require embedding SQL in a procedural language. Alternatives are
expressed in TSQL2, a temporal extension to SQL-92.
29.16.1. INTRODUCTION
Valid-time support goes beyond that of a temporal ADT. With the later,
a column is specified as of a temporal domain, such as DATE or
INTERVAL (examples will be given shortly). With valid time, the rows
of a table vary over time, as reality changes. The timestamp
associated with a row of a valid-time table is interpreted by the
query language as the time when the combination of values of the
columns in the row was valid. This implicit timestamp allows queries
to be expressed succinctly and intuitively.
29.16.2. A CASE STUDY - STORING CURRENT INFORMATION
The University of Arizona's Office of Appointed Personnel has some
information in a database, including each employee's name, their
current salary, and their current title. This can be represented by a
simple table.
Employee(Name, Salary, Title)
Given this table, finding an employee's salary is easy.
SELECT Salary
FROM Employee
WHERE Name = 'Bob'
Now the OAP wishes to record the date of birth. To do so, a column is
added to the table, yielding the following schema.
Employee(Name, Salary, Title, DateofBirth DATE)
Finding the employee's date of birth is analogous to determining the
salary.
SELECT DateofBirth
FROM Employee
WHERE Name = 'Bob'
29.16.3. A CASE STUDY - STORING HISTORY INFORMATION
The OAP wishes to computerize the employment history. To do so, they
append two columns, one indicating when the information in the row
became valid, the other indicating when the information was no longer
valid.
Employee (Name, Salary, Title, DateofBirth, Start DATE, Stop DATE)
To the data model, these new columns are identical to DateofBirth.
However, their presence has wide-ranging consequences.
29.16.4. A CASE STUDY - PROJECTION
To find an employee's current salary, things are more difficult.
SELECT Salary
FROM Employee
WHERE Name = 'Bob' AND Start <= CURRENT_DATE AND CURRENT_DATE <= Stop
This query is more complicated than the previous one. The culprit is
obviously the two new columns. The OAP wants to distribute to each
employee their salary history. Specifically, for each person, the max�
imal intervals at each salary needs to be determined. Unfortunately,
this is not possible in SQL. An employee could have arbitrarily many
title changes between salary changes.
Name Salary Title DateofBirth Start Stop
---- ------ ----- ----------- ----- ----
Bob 60000 Assistant Provost 1945-04-09 1993-01-01 1993-05-30
Bob 70000 Assistant Provost 1945-04-09 1993-06-01 1993-09-30
Bob 70000 Provost 1945-04-09 1993-10-01 1994-01-31
Bob 70000 Professor 1945-04-09 1994-02-01 1994-12-31
Figure 1
Note that there are three rows in which Bob's salary remained constant
at $70,000. Hence, the result should be two rows for Bob.
Name Salary Start Stop
---- ------ ----- ----
Bob 60000 1993-01-01 1993-05-30
Bob 70000 1993-06-01 1994-12-31
One alternative is to give the user a printout of Salary and Title
information, and have user determine when his/her salary changed. This
alternative is not very appealing or realistic. A second alternative
is to use SQL as much as possible.
CREATE TABLE Temp(Salary, Start, Stop)
AS SELECT Salary, Start, Stop
FROM Employee;
repeat
UPDATE Temp T1
SET (T1.Stop) = (SELECT MAX(T2.Stop)
FROM Temp AS T2
WHERE T1.Salary = T2.Salary AND T1.Start < T2.Start
AND T1.Stop >= T2.Start AND T1.Stop < T2.Stop)
WHERE EXISTS (SELECT *
FROM Temp AS T2
WHERE T1.Salary = T2.Salary AND T1.Start < T2.Start
AND T1.Stop >= T2.Start AND T1.Stop < T2.Stop)
until no rows updated;
DELETE FROM Temp T1
WHERE EXISTS (SELECT *
FROM Temp AS T2
WHERE T1.Salary = T2.Salary
AND ((T1.Start > T2.Start AND T1.Stop <= T2.Stop)
OR (T1.Start >= T2.Start AND T1.Stop < T2.Stop))
The loop finds those intervals that overlap or are adjacent and thus
should be merged. The loop is executed log N times in the worst case,
where N is the number of rows in a chain of overlapping or adjacent
value-equivalent rows. The reader can simulate the query on the exam�
ple table to convince him/herself of its correctness.
A third alternative is to use SQL only to open a cursor on the table.
A linked list of periods is maintained, each with a salary. This
linked list should be initialized to empty.
DECLARE emp_cursor CURSOR FOR
SELECT Salary, Title, Start, Stop
FROM Employee;
OPEN emp_cursor;
loop:
FETCH emp_cursor INTO :salary, :start, :stop;
if no-data returned then goto finished;
find position in linked list to insert this information;
goto loop;
finished:
CLOSE emp_cursor;
iterate through linked list, printing out dates and salaries
The linked list may not be necessary in this case if the cursor is
ORDER BY Start.
In any case, the query, a natural one, is quite difficult to express
using the facilities present in SQL-92. The query is trivial in TSQL2.
SELECT Salary
FROM Employee
29.16.5. A CASE STUDY - JOIN
A more drastic approach is to avoid the problem of extracting the
salary history by reorganizing the schema to separate salary, title,
and date of birth information (in the following, we ignore the date of
birth, for simplicity).
Employee1 (Name, Salary, Start DATE, Stop DATE)
Employee2 (Name, Title, Start DATE, Stop DATE)
The Employee1 table is as follows.
Name Salary Start Stop
---- ------ ----- ----
Bob 60000 1993-01-01 1993-05-30
Bob 70000 1993-06-01 1993-12-31
Here is the example Employee2 table.
Name Title Start Stop
---- ------ ----- ----
Bob Assistant Provost 1993-01-01 1993-09-30
Bob Provost 1993-10-01 1994-01-31
Bob Professor 1994-02-01 1994-12-31
With this change, getting the salary information for an employee is
now easy.
SELECT Salary, Start, Stop
FROM Employee1
WHERE Name = 'Bob'
But what if the OAP wants a table of salary, title intervals (that is,
suppose the OAP wishes a table to be computed in the form of Figure
1)? One alternative is to print out two tables, and let the user fig�
ure out the combinations. A second alternative is to use SQL entirely.
Unfortunately, this query must do a case analysis of how each row of
Employee1 overlaps each row of Employee2; there are four possible
cases.
SELECT Employee1.Name, Salary, Dept, Employee1.Start, Employee1.Stop
FROM Employee1, Employee2
WHERE Employee1.Name = Employee2.Name
AND Employee2.Start <= Employee1.Start AND Employee1.Stop < Employee2.Stop
UNION
SELECT Employee1.Name, Salary, Dept, Employee1.Start, Employee2.Stop
FROM Employee1, Employee2
WHERE Employee1.Name = Employee2.Name
AND Employee1.Start >= Employee2.Start AND Employee2.Stop < Employee1.Stop
AND Employee1.Start < Employee2.Stop
UNION
SELECT Employee1.Name, Salary, Dept, Employee2.Start, Employee1.Stop
FROM Employee1, Employee2
WHERE Employee1.Name = Employee2.Name
AND Employee2.Start > Employee1.Start AND Employee1.Stop < Employee2.Stop
AND Employee2.Start < Employee1.Stop
UNION
SELECT Employee1.Name, Salary, Dept, Employee2.Start, Employee2.Stop
FROM Employee1, Employee2
WHERE Employee1.Name = Employee2.Name
AND Employee2.Start > Employee1.Start AND Employee2.Stop < Employee1.Stop
Getting all the cases right is a challenging task. In TSQL2, perform�
ing a temporal join is just what one would expect.
SELECT Employee1.Name, Salary, Dept
FROM Employee1, Employee2
WHERE Employee1.Name = Employee2.Name
29.16.6. A CASE STUDY - AGGREGATES
Now the OAP is asked, what is the maximum salary? Before adding time,
this was easy.
SELECT MAX(Salary)
FROM Employee
Now that the salary history is stored, we'd like a history of the max�
imum salary over time. The problem, of course, is that SQL does not
provide temporal aggregates. The easy way to do this is to print out
the information, and scan manually for the maximums. An alternative is
to be tricky and convert the snapshot aggregate query into a non-
aggregate query, then convert that into a temporal query. The non-
aggregate query finds those salaries for which a greater salary does
not exist.
SELECT Salary
FROM Employee AS E1
WHERE NOT EXISTS (SELECT *
FROM Employee AS E2
WHERE E2.Salary > E1.Salary)
Converting this query into a temporal query is far from obvious. The
following is one approach.
CREATE TABLE Temp (Salary, Start, Stop)
AS SELECT Salary, Start, Stop
FROM Employee;
INSERT INTO Temp
SELECT T.Salary, T.Start, E.Start
FROM Temp AS T, Employee AS E
WHERE E.Start >= T.Start AND E.Start < T.Stop AND E.Salary > T.Salary;
INSERT INTO Temp
SELECT T.Salary, T.Stop, E.Stop
FROM Temp AS T, Employee AS E
WHERE E.Stop > T.Start AND E.Stop <= T.Stop AND E.Salary > T.Salary;
DELETE FROM Temp T
WHERE EXISTS (SELECT *
FROM Employee AS E
WHERE ((T.Start => E.Start AND T.Start < E.Stop)
OR (E.Start >= T.Start AND E.Start < T.Stop))
AND E.Salary > T.Salary;
This approach creates an auxiliary table. We add to this table the
lower period of a period subtraction and the upper period of a period
subtraction. We then delete all periods that overlap with some row
defined by the subquery, thereby effecting the NOT EXISTS. Finally we
generate from the auxiliary table maximal periods, in the same way
that the salary information was computed above. As one might imagine,
such SQL code is extremely inefficient to execute, given the complex
nested queries with inequality predicates.
A third alternative is to use SQL as little as possible, and instead
compute the desired maximum history in a host language using cursors.
The query in TSQL2 is again straightforward and intuitive.
SELECT MAX(Salary)
FROM Employee
29.16.7. SUMMARY
Time-varying data is manipulated in most database applications. Valid-
time support is absent in SQL. Many common temporal queries are either
difficult to simulate in SQL, or require embedding SQL in a procedural
language, due to SQL's lack of support for valid-time tables in its
data model and query constructs.
Elsewhere, we showed that adding valid-time support requires few
changes to the DBMS implementation, can dramatically simplify some
queries and enable others, and can later enable optimizations in
storage structures, indexing methods, and optimization strategies that
can yield significant performance improvements.
With a new part of SQL3 supporting time-varying information, we can
begin to address such applications, enabling SQL3 to better manage
temporal data.
----------------------------------------------------------------------------
Accredited Standards Committee* X3, Information Technology
NEWS RELEASE
Doc. No.: PR/96-0002
Reply to: Barbara Bennett at
[email protected]
X3 Announces the Approval of a New Project, ISO/IEC
9075 Part 7: SQL/Temporal
Washington D.C., January 1996
----------------------------------------------------------------------------
-- Accredited Standards Committee X3, Information Technology is
announcing the approval of a new project on SQL/Temporal Support,
ISO/IEC 9075 Part 7, with the work being done in Technical Committee
X3H2, Database. The scope of this proposed standard specifies a new
Part of the emerging SQL3 standard, e.g., Part 7, Temporal SQL, to be
extensions to the SQL language supporting storage, retrieval, and
manipulation of temporal data in an SQL database environment. The
next X3H2 meeting is scheduled for March 11-14, 1996 in Kansas.
Inquiries regarding this project should be sent to the
Chairman of X3H2,
Dr. Donald R. Deutsch,
Sybase, Inc., Suite 800,
6550 Rock Spring
Drive, Bethesda, MD 20817.
Email:
[email protected].
An initial call for possible patents and other pertinent issues (copy�
rights, trademarks) is now being issued. Please submit information on
these issues to the
X3 Secretariat at
1250 Eye Street
NW, Suite 200,
Washington DC 20005.
Email:
[email protected]
FAX: (202)638-4922.
29.17. Part 8 - ISO/ANSI SQL MULTIMEDIA (SQL/MM)
A new ISO/IEC international standardization project for development of
an SQL class library for multimedia applications was approved in early
1993. This new standardization activity, named SQL Multimedia
(SQL/MM), will specify packages of SQL abstract data type (ADT)
definitions using the facilities for ADT specification and invocation
provided in the emerging SQL3 specification. SQL/MM intends to
standardize class libraries for science and engineering, full-text and
document processing, and methods for the management of multimedia
objects such as image, sound, animation, music, and video. It will
likely provide an SQL language binding for multimedia objects defined
by other JTC1 standardization bodies (e.g. SC18 for documents, SC24
for images, and SC29 for photographs and motion pictures).
The Project Plan for SQL/MM indicates that it will be a multi-part
standard consisting of an evolving number of parts. Part 1 will be a
Framework that specifies how the other parts are to be constructed.
Each of the other parts will be devoted to a specific SQL application
package. The following SQL/MM Part structure exists as of August 1994:
� Part 1: Framework A non-technical description of how the document
is structured.
� Part 2: Full Text Methods and ADTs for text data processing. About
45 pages.
� Part 3: Spatial Methods and ADTs for spatial data management. About
200 pages with active contributions from Spatial Data experts from
3 national bodies.
� Part 4: General Purpose Methods and ADTs for complex numbers,
Facilities include trig and exponential functions, vectors, sets,
etc. Currently about 90 pages.
There are a number of standards efforts in the area of Spatial and
Geographic information:
� ANSI X3L1 - Geographic Information Systems. Mark Ashworth of
Unisys is the liason between X3L1 and ANSI X3H2. He is also the
editor for parts 1, 3, and 4 of the SQL/MM draft.
� ISO TC 211 - Geographic information/Geomatics
30. Technical support for PostgreSQL
This is the order of problem solving:
� Your question can be answered by online manuals
<
http://www.postgresql.org/users-lounge>
� Enter a keyword in the search box
<
http://www.postgresql.org/search.cgi>
� Post your question in the mailing list
If you have any technical question or encounter any problem you can
e-mail to:
�
[email protected]
� Newsgroup <comp.databases.postgresql.general>
� Newsgroup <comp.databases.postgresql.hackers>
� Newsgroup <comp.databases.postgresql.doc>
� Newsgroup <comp.databases.postgresql.bugs>
� Newsgroup <linux.postgres>
� Other Mailing lists <
http://www.postgresql.org>
and expect e-mail answer in less than a day. As the user-base of
internet product is very vast, and users support other users,
internet will be capable of giving technical support to billions of
users easily. Email support is much more convenient than telephone
support as you can cut and paste error messages, program output
etc.. and easily transmit to mailing list/newsgroup.
30.1. Commercial Support
PostgreSQL organisation is selling technical support to companies, the
revenue generated will be used for maintaining several mirror sites
(web and ftp) around the world. The revenue will also be used to
produce printed documentation, guides, textbooks which will help the
customers. They are at <
http://www.postgresql.org>
Another company called 'Great Bridge Corporation' is doing
development, sales and support of PostgreSQL. They are at
<
http://www.greatbridge.com>. It is a public company setup by
'Landmark Communications corp' and other venture capital firms to
exclusively sell and support PostgreSQL to very large enterprises and
corporations all over the world.
You can also take help from professional consulting firms like RedHat,
Anderson, WGS (Work Group Solutions). Contact them for help, since
they have very good expertise in "C", "C++" (PostgreSQL is written in
"C") -
� Redhat Corp - Database consulting division <
http://www.redhat.com>
� Work Group Solutions <
http://www.wgs.com>
� Anderson Consulting <
http://www.ac.com>
31. Economic and Business Aspects
Commercial databases pay many taxes like federal, state, sales,
employment, social security, medicare taxes, health care for
employees, bunch of benefits for employees, marketing and
advertisement costs. All these costs do not go directly for the
development of the database and do not improve the quality or
technology of the database. When you buy a commercial database, some
portion of the amount goes for overheads like taxes, expenses and
balance for database R&D costs.
Also commercial databases have to pay for buildings/real-estates and
purchase Unix machines, install and maintain them. All of these costs
are passed onto customers.
PostgreSQL has the advantage over commercial databases as there is no
direct taxes since it is made on the internet. A very vast group of
people contribute to the development of the PostgreSQL. For example,
in a hypothetical case, if there are one million companies in U.S.A
and each contribute about $ 10 (worth of software to PostgreSQL) then
each and every company will get ten million dollars!! This is the
GREAT MAGIC of software development on internet.
Currently, PostgreSQL source code is about 2,50,000 lines of "C",
"C++" code. If cost of each line of "C" code is $ 2 then the
PostgreSQL is worth about $ 5,00,000 (half a million dollars!).
Many companies already develop in-house vast amount of "C", "C++"
code. Hence by taking in the source code of PostgreSQL and
collaborating with other companies on internet will greatly benefit
the company saving time and efforts.
32. List of Other Databases
Listed below are other SQL databases for Unix, Linux.
� Click and go to Applications->databases.
<
http://www.caldera.com/tech-ref/linuxapps/linapps.html>
� Click and go to Applications->databases.
<
http://www.xnet.com/~blatura/linapps.shtml>
� Database resources <
http://linas.org/linux/db.html> This was
written by Linas Vepstas:
[email protected]
� Free Database List
<
http://cuiwww.unige.ch:80/~scg/FreeDB/FreeDB.list.html>
� Browne's RDBMS List <
http://www.hex.net/~cbbrowne/rdbms.html>
written by Christopher B. Browne
[email protected]
� SAL's List of Relational DBMS <
http://SAL.KachinaTech.COM/H/1/>
� SAL's List of Object-Oriented DBMS
<
http://SAL.KachinaTech.COM/H/2/>
� SAL's List of Utilites and Other Databases
<
http://SAL.KachinaTech.COM/H/3/>
� ACM SIGMOD Index of Publicly Available Database Software
<
http://bunny.cs.uiuc.edu/sigmod/databaseSoftware/>
33. Internet World Wide Web Searching Tips
Internet is very vast and it has vast number of software and has an
ocean of information underneath. It is growing at the rate of 300%
annually world wide. It is estimated that there are about 10 million
Web sites world wide!
To search for an information you would use search engines like
"Yahoo", "Netscape", "Lycos" etc. Go to Yahoo, click on search. Use
filtering options to narrow down your search criteria. The default
search action is "Intelligent search" which is more general and lists
all possiblities. Click on "Options" to select "EXACT phrase" search,
"AND" search, "OR" search, etc.. This way you would find the
information you need much faster. Also in the search menu, there are
radio-buttons for searching in Usenet, Web-sites and Yahoo sites.
34. Conclusion
After researching all the available databases which are free and
source code is available, it was found that ONLY PostgreSQL is the
MOST mature, most widely used and robust RDBMS SQL free database
(object relational) in the world.
PostgreSQL is very appealing since lot of work had already been done.
It has ODBC and JDBC drivers, using these it is possible to write
applications independent of the databases. The applications written in
PostgreSQL using ODBC, JDBC drivers are easily portable to other
databases like Oracle, Sybase and Informix and vice versa.
You may ask "But why PostgreSQL ?" The answer is, since it takes lot
more time to develop a database system from scratch, it makes sense to
pick up a database system which satisfies the following conditions -
A database system
� Whose source code is available - Must be a 'Open Source Code'
system
� Has no license strings, no ownership strings attached to it
� Which can be distributed on internet
� Which had been on development for several years.
� Which satisfies standards like ISO/ANSI SQL 92 (and SQL 89)
� Which can satisfy future needs like SQL 3 (SQL 98)
� Which has advanced capabilities
And it just happens to be 'PostgreSQL' which satisfies all these
conditions and is an appropriate software for this situation. You
may say 'PostgreSQL' is a very strange name (It is pronounced as
Post-gres-cue-el and not Postgre-es-cue-el. It's a very unusual
name and it is very hard to pronounce). But my argument is - why
change the name. This world is stuck with "PostgreSQL" forever and
people all over the world love this name!!
35. FAQ - Questions on PostgreSQL
Please refer to the latest version of FAQ for General, Linux and Irix
at
� <
http://www.postgresql.org/docs/faq-english.shtml>
36. Other Formats of this Document
This document is published in 11 different formats namely - DVI,
Postscript, Latex, Adobe Acrobat PDF, LyX, GNU-info, HTML, RTF(Rich
Text Format), Plain-text, Unix man pages and SGML.
� You can get this HOWTO document as a single file tar ball in HTML,
DVI, Postscript or SGML formats from -
<
ftp://sunsite.unc.edu/pub/Linux/docs/HOWTO/other-formats/> and
<
http://www.linuxdoc.org/docs.html#howto>
� Plain text format is in:
<
ftp://sunsite.unc.edu/pub/Linux/docs/HOWTO> and
<
http://www.linuxdoc.org/docs.html#howto>
� Single HTML file format is in:
<
http://www.linuxdoc.org/docs.html#howto>
� Translations to other languages like French, German, Spanish,
Chinese, Japanese are in
<
ftp://sunsite.unc.edu/pub/Linux/docs/HOWTO> and
<
http://www.linuxdoc.org/docs.html#howto> Any help from you to
translate to other languages is welcome.
The document is written using a tool called "SGML-Tools" which can
be got from - <
http://www.sgmltools.org> Compiling the source you
will get the following commands like
� sgml2html databasehowto.sgml (to generate html file)
� sgml2rtf databasehowto.sgml (to generate RTF file)
� sgml2latex databasehowto.sgml (to generate latex file)
LaTeX documents may be converted into PDF files simply by producing a
Postscript output using sgml2latex ( and dvips) and running the output
through the Acrobat distill ( <
http://www.adobe.com>) command as
follows:
______________________________________________________________________
bash$ man sgml2latex
bash$ sgml2latex filename.sgml
bash$ man dvips
bash$ dvips -o filename.ps filename.dvi
bash$ distill filename.ps
bash$ man ghostscript
bash$ man ps2pdf
bash$ ps2pdf input.ps output.pdf
bash$ acroread output.pdf &
______________________________________________________________________
Or you can use Ghostscript command ps2pdf. ps2pdf is a work-alike for
nearly all the functionality of Adobe's Acrobat Distiller product: it
converts PostScript files to Portable Document Format (PDF) files.
ps2pdf is implemented as a very small command script (batch file) that
invokes Ghostscript, selecting a special "output device" called
pdfwrite. In order to use ps2pdf, the pdfwrite device must be included
in the makefile when Ghostscript was compiled; see the documentation
on building Ghostscript for details.
This howto document is located at -
� <
http://sunsite.unc.edu/LDP/HOWTO/PostgreSQL-HOWTO.html>
Also you can find this document at the following mirrors sites -
� <
http://www.caldera.com/LDP/HOWTO/PostgreSQL-HOWTO.html>
� <
http://www.WGS.com/LDP/HOWTO/PostgreSQL-HOWTO.html>
� <
http://www.cc.gatech.edu/linux/LDP/HOWTO/PostgreSQL-HOWTO.html>
� <
http://www.redhat.com/linux-info/ldp/HOWTO/PostgreSQL-HOWTO.html>
� Other mirror sites near you (network-address-wise) can be found at
<
http://sunsite.unc.edu/LDP/hmirrors.html> select a site and go to
directory /LDP/HOWTO/PostgreSQL-HOWTO.html
In order to view the document in dvi format, use the xdvi program. The
xdvi program is located in tetex-xdvi*.rpm package in Redhat Linux
which can be located through ControlPanel | Applications | Publishing
| TeX menu buttons. To read dvi document give the command -
xdvi -geometry 80x90 howto.dvi
man xdvi
And resize the window with mouse. To navigate use Arrow keys, Page
Up, Page Down keys, also you can use 'f', 'd', 'u', 'c', 'l', 'r',
'p', 'n' letter keys to move up, down, center, next page, previous
page etc. To turn off expert menu press 'x'.
You can read postscript file using the program 'gv' (ghostview) or The
ghostscript program is in ghostscript*.rpm package and gv program is
in gv*.rpm package in Redhat Linux which can be located through
ControlPanel | Applications | Graphics menu buttons. The gv program is
much more user friendly than ghostscript. Also ghostscript and gv are
available on other platforms like OS/2, Windows 95 and NT, you view
this document even on those platforms.
� Get ghostscript for Windows 95, OS/2, and for all OSes from
<
http://www.cs.wisc.edu/~ghost>
To read postscript document give the command -
gv howto.ps
ghostscript howto.ps
CAUTION: This document is large, total number of pages (postscript) if
printed will be approximately 113 pages.
You can read HTML format document using Netscape Navigator, Microsoft
Internet explorer, Redhat Baron Web browser or any of the 10 other web
browsers.
You can read the latex, LyX output using LyX a X-Windows front end to
latex.
37. Copyright and License
Copyright Al Dev (Alavoor Vasudevan) 1997-2000.
License policy is GNU/GPL as per LDP (Linux Documentation project).
LDP is a GNU/GPL project. Additional restrictions are - you must
retain the author's name, email address and this copyright notice on
all the copies. If you make any changes or additions to this document
then you should intimate all the authors of this document.
NO LIABILITY FOR CONSEQUENTIAL DAMAGES. In no event shall the
author/authors of this document be liable for any damages whatsoever
(including without limitation, special, incidental, consequential, or
direct/indirect damages for personal injury, loss of business profits,
business interruption, loss of business information, or any other
pecuniary loss) arising out of the use of this document.
Author/authors offers no warranties or guarantees on fitness,
usability, merchantability of this document. Brands, companies and
product names mentioned in this document are trademarks or registered
trademarks of their respective holders. Please refer to individual
copyright notices of brands, companies and products mentioned in this
document. It is your responsibility to read and understand the
copyright notices of the organisations/companies/products/authors
mentioned in this document before using their respective information.
AL. Appendix A - Syntax of ANSI/ISO SQL 1992
This file contains a depth-first tree traversal of the BNF
for the language done at about 27-AUG-1992 11:03:41.64.
The specific version of the BNF included here is: ANSI-only, SQL2-only.
<SQL terminal character> ::=
<SQL language character>
| <SQL embedded language character>
<SQL language character> ::=
<simple Latin letter>
| <digit>
| <SQL special character>
<simple Latin letter> ::=
<simple Latin upper case letter>
| <simple Latin lower case letter>
<simple Latin upper case letter> ::=
A | B | C | D | E | F | G | H | I | J | K | L | M | N | O
| P | Q | R | S | T | U | V | W | X | Y | Z
<simple Latin lower case letter> ::=
a | b | c | d | e | f | g | h | i | j | k | l | m | n | o
| p | q | r | s | t | u | v | w | x | y | z
<digit> ::=
0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9
<SQL special character> ::=
<space>
| <double quote>
| <percent>
| <ampersand>
| <quote>
| <left paren>
| <right paren>
| <asterisk>
| <plus sign>
| <comma>
| <minus sign>
| <period>
| <solidus>
| <colon>
| <semicolon>
| <less than operator>
| <equals operator>
| <greater than operator>
| <question mark>
| <underscore>
| <vertical bar>
<space> ::= !! <EMPHASIS>(space character in character set in use)
<double quote> ::= "
<percent> ::= %
<ampersand> ::= &
<quote> ::= '
<left paren> ::= (
<right paren> ::= )
<asterisk> ::= *
<plus sign> ::= +
<comma> ::= ,
<minus sign> ::= -
<period> ::= .
<solidus> ::= /
<colon> ::= :
<semicolon> ::= ;
<less than operator> ::= <
<equals operator> ::= =
<greater than operator> ::= >
<question mark> ::= ?
<underscore> ::= _
<vertical bar> ::= |
<SQL embedded language character> ::=
<left bracket>
| <right bracket>
<left bracket> ::= [
<right bracket> ::= ]
<token> ::=
<nondelimiter token>
| <delimiter token>
<nondelimiter token> ::=
<regular identifier>
| <key word>
| <unsigned numeric literal>
| <national character string literal>
| <bit string literal>
| <hex string literal>
<regular identifier> ::= <identifier body>
<identifier body> ::=
<identifier start> [ ( <underscore> | <identifier part> )... ]
<identifier start> ::= <EMPHASIS>(!! See the Syntax Rules)
<identifier part> ::=
<identifier start>
| <digit>
<key word> ::=
<reserved word>
| <non-reserved word>
<reserved word> ::=
ABSOLUTE | ACTION | ADD | ALL
| ALLOCATE | ALTER | AND
| ANY | ARE
| AS | ASC
| ASSERTION | AT
| AUTHORIZATION | AVG
| BEGIN | BETWEEN | BIT | BIT_LENGTH
| BOTH | BY
| CASCADE | CASCADED | CASE | CAST
| CATALOG
| CHAR | CHARACTER | CHAR_LENGTH
| CHARACTER_LENGTH | CHECK | CLOSE | COALESCE
| COLLATE | COLLATION
| COLUMN | COMMIT
| CONNECT
| CONNECTION | CONSTRAINT
| CONSTRAINTS | CONTINUE
| CONVERT | CORRESPONDING | COUNT | CREATE | CROSS
| CURRENT
| CURRENT_DATE | CURRENT_TIME
| CURRENT_TIMESTAMP | CURRENT_USER | CURSOR
| DATE | DAY | DEALLOCATE | DEC
| DECIMAL | DECLARE | DEFAULT | DEFERRABLE
| DEFERRED | DELETE | DESC | DESCRIBE | DESCRIPTOR
| DIAGNOSTICS
| DISCONNECT | DISTINCT | DOMAIN | DOUBLE | DROP
| ELSE | END | END-EXEC | ESCAPE
| EXCEPT | EXCEPTION
| EXEC | EXECUTE | EXISTS
| EXTERNAL | EXTRACT
| FALSE | FETCH | FIRST | FLOAT | FOR
| FOREIGN | FOUND | FROM | FULL
| GET | GLOBAL | GO | GOTO
| GRANT | GROUP
| HAVING | HOUR
| IDENTITY | IMMEDIATE | IN | INDICATOR
| INITIALLY | INNER | INPUT
| INSENSITIVE | INSERT | INT | INTEGER | INTERSECT
| INTERVAL | INTO | IS
| ISOLATION
| JOIN
| KEY
| LANGUAGE | LAST | LEADING | LEFT
| LEVEL | LIKE | LOCAL | LOWER
| MATCH | MAX | MIN | MINUTE | MODULE
| MONTH
| NAMES | NATIONAL | NATURAL | NCHAR | NEXT | NO
| NOT | NULL
| NULLIF | NUMERIC
| OCTET_LENGTH | OF
| ON | ONLY | OPEN | OPTION | OR
| ORDER | OUTER
| OUTPUT | OVERLAPS
| PAD | PARTIAL | POSITION | PRECISION | PREPARE
| PRESERVE | PRIMARY
| PRIOR | PRIVILEGES | PROCEDURE | PUBLIC
| READ | REAL | REFERENCES | RELATIVE | RESTRICT
| REVOKE | RIGHT
| ROLLBACK | ROWS
| SCHEMA | SCROLL | SECOND | SECTION
| SELECT
| SESSION | SESSION_USER | SET
| SIZE | SMALLINT | SOME | SPACE | SQL | SQLCODE
| SQLERROR | SQLSTATE
| SUBSTRING | SUM | SYSTEM_USER
| TABLE | TEMPORARY
| THEN | TIME | TIMESTAMP
| TIMEZONE_HOUR | TIMEZONE_MINUTE
| TO | TRAILING | TRANSACTION
| TRANSLATE | TRANSLATION | TRIM | TRUE
| UNION | UNIQUE | UNKNOWN | UPDATE | UPPER | USAGE
| USER | USING
| VALUE | VALUES | VARCHAR | VARYING | VIEW
| WHEN | WHENEVER | WHERE | WITH | WORK | WRITE
| YEAR
| ZONE
<non-reserved word> ::=
ADA
| C | CATALOG_NAME
| CHARACTER_SET_CATALOG | CHARACTER_SET_NAME
| CHARACTER_SET_SCHEMA | CLASS_ORIGIN | COBOL | COLLATION_CATALOG
| COLLATION_NAME | COLLATION_SCHEMA | COLUMN_NAME | COMMAND_FUNCTION
| COMMITTED
| CONDITION_NUMBER | CONNECTION_NAME | CONSTRAINT_CATALOG | CONSTRAINT_NAME
| CONSTRAINT_SCHEMA | CURSOR_NAME
| DATA | DATETIME_INTERVAL_CODE
| DATETIME_INTERVAL_PRECISION | DYNAMIC_FUNCTION
| FORTRAN
| LENGTH
| MESSAGE_LENGTH | MESSAGE_OCTET_LENGTH | MESSAGE_TEXT | MORE | MUMPS
| NAME | NULLABLE | NUMBER
| PASCAL | PLI
| REPEATABLE | RETURNED_LENGTH | RETURNED_OCTET_LENGTH | RETURNED_SQLSTATE
| ROW_COUNT
| SCALE | SCHEMA_NAME | SERIALIZABLE | SERVER_NAME | SUBCLASS_ORIGIN
| TABLE_NAME | TYPE
| UNCOMMITTED | UNNAMED
<unsigned numeric literal> ::=
<exact numeric literal>
| <approximate numeric literal>
<exact numeric literal> ::=
<unsigned integer> [ <period> [ <unsigned integer> ] ]
| <period> <unsigned integer>
<unsigned integer> ::= <digit>...
<approximate numeric literal> ::= <mantissa> E <exponent>
<mantissa> ::= <exact numeric literal>
<exponent> ::= <signed integer>
<signed integer> ::= [ <sign> ] <unsigned integer>
<sign> ::= <plus sign> | <minus sign>
<national character string literal> ::=
N <quote> [ <character representation>... ] <quote>
[ ( <separator>... <quote> [ <character representation>... ] <quote> )... ]
<character representation> ::=
<nonquote character>
| <quote symbol>
<nonquote character> ::= !! <EMPHASIS>(See the Syntax Rules.)
<quote symbol> ::= <quote><quote>
<separator> ::= ( <comment> | <space> | <newline> )...
<comment> ::=
<comment introducer> [ <comment character>... ] <newline>
<comment introducer> ::= <minus sign><minus sign>[<minus sign>...]
<comment character> ::=
<nonquote character>
| <quote>
<newline> ::= !! <EMPHASIS>(implementation-defined end-of-line indicator)
<bit string literal> ::=
B <quote> [ <bit>... ] <quote>
[ ( <separator>... <quote> [ <bit>... ] <quote> )... ]
<bit> ::= 0 | 1
<hex string literal> ::=
X <quote> [ <hexit>... ] <quote>
[ ( <separator>... <quote> [ <hexit>... ] <quote> )... ]
<hexit> ::= <digit> | A | B | C | D | E | F | a | b | c | d | e | f
<delimiter token> ::=
<character string literal>
| <date string>
| <time string>
| <timestamp string>
| <interval string>
| <delimited identifier>
| <SQL special character>
| <not equals operator>
| <greater than or equals operator>
| <less than or equals operator>
| <concatenation operator>
| <double period>
| <left bracket>
| <right bracket>
<character string literal> ::=
[ <introducer><character set specification> ]
<quote> [ <character representation>... ] <quote>
[ ( <separator>... <quote> [ <character representation>... ] <quote> )... ]
<introducer> ::= <underscore>
<character set specification> ::=
<standard character repertoire name>
| <implementation-defined character repertoire name>
| <user-defined character repertoire name>
| <standard universal character form-of-use name>
| <implementation-defined universal character form-of-use name>
<standard character repertoire name> ::= <character set name>
<character set name> ::= [ <schema name> <period> ]
<SQL language identifier>
<schema name> ::=
[ <catalog name> <period> ] <unqualified schema name>
<catalog name> ::= <identifier>
<identifier> ::=
[ <introducer><character set specification> ] <actual identifier>
<actual identifier> ::=
<regular identifier>
| <delimited identifier>
<delimited identifier> ::=
<double quote> <delimited identifier body> <double quote>
<delimited identifier body> ::= <delimited identifier part>...
<delimited identifier part> ::=
<nondoublequote character>
| <doublequote symbol>
<nondoublequote character> ::= <EMPHASIS>(!! See the Syntax Rules)
<doublequote symbol> ::= <double quote><double quote>
<unqualified schema name> ::= <identifier>
<SQL language identifier> ::=
<SQL language identifier start>
[ ( <underscore> | <SQL language identifier part> )... ]
<SQL language identifier start> ::= <simple Latin letter>
<SQL language identifier part> ::=
<simple Latin letter>
| <digit>
<implementation-defined character repertoire name> ::=
<character set name>
<user-defined character repertoire name> ::= <character set name>
<standard universal character form-of-use name> ::=
<character set name>
<implementation-defined universal character form-of-use name> ::=
<character set name>
<date string> ::=
<quote> <date value> <quote>
<date value> ::=
<years value> <minus sign> <months value>
<minus sign> <days value>
<years value> ::= <datetime value>
<datetime value> ::= <unsigned integer>
<months value> ::= <datetime value>
<days value> ::= <datetime value>
<time string> ::=
<quote> <time value> [ <time zone interval> ] <quote>
<time value> ::=
<hours value> <colon> <minutes value> <colon> <seconds value>
<hours value> ::= <datetime value>
<minutes value> ::= <datetime value>
<seconds value> ::=
<seconds integer value> [ <period> [ <seconds fraction> ] ]
<seconds integer value> ::= <unsigned integer>
<seconds fraction> ::= <unsigned integer>
<time zone interval> ::=
<sign> <hours value> <colon> <minutes value>
<timestamp string> ::=
<quote> <date value> <space> <time value>
[ <time zone interval> ] <quote>
<interval string> ::=
<quote> ( <year-month literal> | <day-time literal> ) <quote>
<year-month literal> ::=
<years value>
| [ <years value> <minus sign> ] <months value>
<day-time literal> ::=
<day-time interval>
| <time interval>
<day-time interval> ::=
<days value>
[ <space> <hours value> [ <colon> <minutes value>
[ <colon> <seconds value> ] ] ]
<time interval> ::=
<hours value> [ <colon> <minutes value> [ <colon> <seconds value> ] ]
| <minutes value> [ <colon> <seconds value> ]
| <seconds value>
<not equals operator> ::= <>
<greater than or equals operator> ::= >=
<less than or equals operator> ::= <=
<concatenation operator> ::= ||
<double period> ::= ..
<module> ::=
<module name clause>
<language clause>
<module authorization clause>
[ <temporary table declaration>... ]
<module contents>...
<module name clause> ::=
MODULE [ <module name> ]
[ <module character set specification> ]
<module name> ::= <identifier>
<module character set specification> ::=
NAMES ARE <character set specification>
<language clause> ::=
LANGUAGE <language name>
<language name> ::=
ADA | C | COBOL | FORTRAN | MUMPS | PASCAL | PLI
<module authorization clause> ::=
SCHEMA <schema name>
| AUTHORIZATION <module authorization identifier>
| SCHEMA <schema name>
AUTHORIZATION <module authorization identifier>
<module authorization identifier> ::=
<authorization identifier>
<authorization identifier> ::= <identifier>
<temporary table declaration> ::=
DECLARE LOCAL TEMPORARY TABLE
<qualified local table name>
<table element list>
[ ON COMMIT ( PRESERVE | DELETE ) ROWS ]
<qualified local table name> ::=
MODULE <period> <local table name>
<local table name> ::= <qualified identifier>
<qualified identifier> ::= <identifier>
<table element list> ::=
<left paren> <table element> [ ( <comma> <table element> )... ] <right paren>
<table element> ::=
<column definition>
| <table constraint definition>
<column definition> ::=
<column name> ( <data type> | <domain name> )
[ <default clause> ]
[ <column constraint definition>... ]
[ <collate clause> ]
<column name> ::= <identifier>
<data type> ::=
<character string type>
[ CHARACTER SET <character set specification> ]
| <national character string type>
| <bit string type>
| <numeric type>
| <datetime type>
| <interval type>
<character string type> ::=
CHARACTER [ <left paren> <length> <right paren> ]
| CHAR [ <left paren> <length> <right paren> ]
| CHARACTER VARYING <left paren> <length> <right paren>
| CHAR VARYING <left paren> <length> <right paren>
| VARCHAR <left paren> <length> <right paren>
<length> ::= <unsigned integer>
<national character string type> ::=
NATIONAL CHARACTER [ <left paren> <length> <right paren> ]
| NATIONAL CHAR [ <left paren> <length> <right paren> ]
| NCHAR [ <left paren> <length> <right paren> ]
| NATIONAL CHARACTER VARYING <left paren> <length> <right paren>
| NATIONAL CHAR VARYING <left paren> <length> <right paren>
| NCHAR VARYING <left paren> <length> <right paren>
<bit string type> ::=
BIT [ <left paren> <length> <right paren> ]
| BIT VARYING <left paren> <length> <right paren>
<numeric type> ::=
<exact numeric type>
| <approximate numeric type>
<exact numeric type> ::=
NUMERIC [ <left paren> <precision> [ <comma> <scale> ] <right paren> ]
| DECIMAL [ <left paren> <precision> [ <comma> <scale> ] <right paren> ]
| DEC [ <left paren> <precision> [ <comma> <scale> ] <right paren> ]
| INTEGER
| INT
| SMALLINT
<precision> ::= <unsigned integer>
<scale> ::= <unsigned integer>
<approximate numeric type> ::=
FLOAT [ <left paren> <precision> <right paren> ]
| REAL
| DOUBLE PRECISION
<datetime type> ::=
DATE
| TIME [ <left paren> <time precision> <right paren> ]
[ WITH TIME ZONE ]
| TIMESTAMP [ <left paren> <timestamp precision> <right paren> ]
[ WITH TIME ZONE ]
<time precision> ::= <time fractional seconds precision>
<time fractional seconds precision> ::= <unsigned integer>
<timestamp precision> ::= <time fractional seconds precision>
<interval type> ::= INTERVAL <interval qualifier>
<interval qualifier> ::=
<start field> TO <end field>
| <single datetime field>
<start field> ::=
<non-second datetime field>
[ <left paren> <interval leading field precision> <right paren> ]
<non-second datetime field> ::= YEAR | MONTH | DAY | HOUR
| MINUTE
<interval leading field precision> ::= <unsigned integer>
<end field> ::=
<non-second datetime field>
| SECOND [ <left paren> <interval fractional seconds precision> <right paren> ]
<interval fractional seconds precision> ::= <unsigned integer>
<single datetime field> ::=
<non-second datetime field>
[ <left paren> <interval leading field precision> <right paren> ]
| SECOND [ <left paren> <interval leading field precision>
[ <comma> <interval fractional seconds precision> ] <right paren> ]
<domain name> ::= <qualified name>
<qualified name> ::=
[ <schema name> <period> ] <qualified identifier>
<default clause> ::=
DEFAULT <default option>
<default option> ::=
<literal>
| <datetime value function>
| USER
| CURRENT_USER
| SESSION_USER
| SYSTEM_USER
| NULL
<literal> ::=
<signed numeric literal>
| <general literal>
<signed numeric literal> ::=
[ <sign> ] <unsigned numeric literal>
<general literal> ::=
<character string literal>
| <national character string literal>
| <bit string literal>
| <hex string literal>
| <datetime literal>
| <interval literal>
<datetime literal> ::=
<date literal>
| <time literal>
| <timestamp literal>
<date literal> ::=
DATE <date string>
<time literal> ::=
TIME <time string>
<timestamp literal> ::=
TIMESTAMP <timestamp string>
<interval literal> ::=
INTERVAL [ <sign> ] <interval string> <interval qualifier>
<datetime value function> ::=
<current date value function>
| <current time value function>
| <current timestamp value function>
<current date value function> ::= CURRENT_DATE
<current time value function> ::=
CURRENT_TIME [ <left paren> <time precision> <right paren> ]
<current timestamp value function> ::=
CURRENT_TIMESTAMP [ <left paren> <timestamp precision> <right paren> ]
<column constraint definition> ::=
[ <constraint name definition> ]
<column constraint>
[ <constraint attributes> ]
<constraint name definition> ::= CONSTRAINT <constraint name>
<constraint name> ::= <qualified name>
<column constraint> ::=
NOT NULL
| <unique specification>
| <references specification>
| <check constraint definition>
<unique specification> ::=
UNIQUE | PRIMARY KEY
<references specification> ::=
REFERENCES <referenced table and columns>
[ MATCH <match type> ]
[ <referential triggered action> ]
<referenced table and columns> ::=
<table name> [ <left paren> <reference column list> <right paren> ]
<table name> ::=
<qualified name>
| <qualified local table name>
<reference column list> ::= <column name list>
<column name list> ::=
<column name> [ ( <comma> <column name> )... ]
<match type> ::=
FULL
| PARTIAL
<referential triggered action> ::=
<update rule> [ <delete rule> ]
| <delete rule> [ <update rule> ]
<update rule> ::= ON UPDATE <referential action>
<referential action> ::=
CASCADE
| SET NULL
| SET DEFAULT
| NO ACTION
<delete rule> ::= ON DELETE <referential action>
<check constraint definition> ::=
CHECK
<left paren> <search condition> <right paren>
<search condition> ::=
<boolean term>
| <search condition> OR <boolean term>
<boolean term> ::=
<boolean factor>
| <boolean term> AND <boolean factor>
<boolean factor> ::=
[ NOT ] <boolean test>
<boolean test> ::=
<boolean primary> [ IS [ NOT ]
<truth value> ]
<boolean primary> ::=
<predicate>
| <left paren> <search condition> <right paren>
<predicate> ::=
<comparison predicate>
| <between predicate>
| <in predicate>
| <like predicate>
| <null predicate>
| <quantified comparison predicate>
| <exists predicate>
| <unique predicate>
| <match predicate>
| <overlaps predicate>
<comparison predicate> ::=
<row value constructor> <comp op>
<row value constructor>
<row value constructor> ::=
<row value constructor element>
| <left paren> <row value constructor list> <right paren>
| <row subquery>
<row value constructor element> ::=
<value expression>
| <null specification>
| <default specification>
<value expression> ::=
<numeric value expression>
| <string value expression>
| <datetime value expression>
| <interval value expression>
<numeric value expression> ::=
<term>
| <numeric value expression> <plus sign> <term>
| <numeric value expression> <minus sign> <term>
<term> ::=
<factor>
| <term> <asterisk> <factor>
| <term> <solidus> <factor>
<factor> ::=
[ <sign> ] <numeric primary>
<numeric primary> ::=
<value expression primary>
| <numeric value function>
<value expression primary> ::=
<unsigned value specification>
| <column reference>
| <set function specification>
| <scalar subquery>
| <case expression>
| <left paren> <value expression> <right paren>
| <cast specification>
<unsigned value specification> ::=
<unsigned literal>
| <general value specification>
<unsigned literal> ::=
<unsigned numeric literal>
| <general literal>
<general value specification> ::=
<parameter specification>
| <dynamic parameter specification>
| <variable specification>
| USER
| CURRENT_USER
| SESSION_USER
| SYSTEM_USER
| VALUE
<parameter specification> ::=
<parameter name> [ <indicator parameter> ]
<parameter name> ::= <colon> <identifier>
<indicator parameter> ::=
[ INDICATOR ] <parameter name>
<dynamic parameter specification> ::= <question mark>
<variable specification> ::=
<embedded variable name> [ <indicator variable> ]
<embedded variable name> ::=
<colon><host identifier>
<host identifier> ::=
<Ada host identifier>
| <C host identifier>
| <COBOL host identifier>
| <Fortran host identifier>
| <MUMPS host identifier>
| <Pascal host identifier>
| <PL/I host identifier>
<Ada host identifier> ::= !! <EMPHASIS>(See the Syntax Rules.)
<C host identifier> ::=
!! <EMPHASIS>(See the Syntax Rules.)
<COBOL host identifier> ::= !! <EMPHASIS>(See the Syntax Rules.)
<Fortran host identifier> ::= !! <EMPHASIS>(See the Syntax Rules.)
<MUMPS host identifier> ::= !! <EMPHASIS>(See the Syntax Rules.)
<Pascal host identifier> ::= !! <EMPHASIS>(See the Syntax Rules.)
<PL/I host identifier> ::= !! <EMPHASIS>(See the Syntax Rules.)
<indicator variable> ::=
[ INDICATOR ] <embedded variable name>
<column reference> ::= [ <qualifier> <period> ] <column name>
<qualifier> ::=
<table name>
| <correlation name>
<correlation name> ::= <identifier>
<set function specification> ::=
COUNT <left paren> <asterisk> <right paren>
| <general set function>
<general set function> ::=
<set function type>
<left paren> [ <set quantifier> ] <value expression> <right paren>
<set function type> ::=
AVG | MAX | MIN | SUM | COUNT
<set quantifier> ::= DISTINCT | ALL
<scalar subquery> ::= <subquery>
<subquery> ::= <left paren> <query expression> <right paren>
<query expression> ::=
<non-join query expression>
| <joined table>
<non-join query expression> ::=
<non-join query term>
| <query expression> UNION [ ALL ]
[ <corresponding spec> ] <query term>
| <query expression> EXCEPT [ ALL ]
[ <corresponding spec> ] <query term>
<non-join query term> ::=
<non-join query primary>
| <query term> INTERSECT [ ALL ]
[ <corresponding spec> ] <query primary>
<non-join query primary> ::=
<simple table>
| <left paren> <non-join query expression> <right paren>
<simple table> ::=
<query specification>
| <table value constructor>
| <explicit table>
<query specification> ::=
SELECT [ <set quantifier> ] <select list> <table expression>
<select list> ::=
<asterisk>
| <select sublist> [ ( <comma> <select sublist> )... ]
<select sublist> ::=
<derived column>
| <qualifier> <period> <asterisk>
<derived column> ::= <value expression> [ <as clause> ]
<as clause> ::= [ AS ] <column name>
<table expression> ::=
<from clause>
[ <where clause> ]
[ <group by clause> ]
[ <having clause> ]
<from clause> ::= FROM <table reference>
[ ( <comma> <table reference> )... ]
<table reference> ::=
<table name> [ [ AS ] <correlation name>
[ <left paren> <derived column list> <right paren> ] ]
| <derived table> [ AS ] <correlation name>
[ <left paren> <derived column list> <right paren> ]
| <joined table>
<derived column list> ::= <column name list>
<derived table> ::= <table subquery>
<table subquery> ::= <subquery>
<joined table> ::=
<cross join>
| <qualified join>
| <left paren> <joined table> <right paren>
<cross join> ::=
<table reference> CROSS JOIN <table reference>
<qualified join> ::=
<table reference> [ NATURAL ] [ <join type> ] JOIN
<table reference> [ <join specification> ]
<join type> ::=
INNER
| <outer join type> [ OUTER ]
| UNION
<outer join type> ::=
LEFT
| RIGHT
| FULL
<join specification> ::=
<join condition>
| <named columns join>
<join condition> ::= ON <search condition>
<named columns join> ::=
USING <left paren> <join column list> <right paren>
<join column list> ::= <column name list>
<where clause> ::= WHERE <search condition>
<group by clause> ::=
GROUP BY <grouping column reference list>
<grouping column reference list> ::=
<grouping column reference>
[ ( <comma> <grouping column reference> )... ]
<grouping column reference> ::=
<column reference> [ <collate clause> ]
<collate clause> ::= COLLATE <collation name>
<collation name> ::= <qualified name>
<having clause> ::= HAVING <search condition>
<table value constructor> ::=
VALUES <table value constructor list>
<table value constructor list> ::=
<row value constructor> [ ( <comma> <row value constructor> )... ]
<explicit table> ::= TABLE <table name>
<query term> ::=
<non-join query term>
| <joined table>
<corresponding spec> ::=
CORRESPONDING [ BY <left paren> <corresponding column list> <right paren> ]
<corresponding column list> ::= <column name list>
<query primary> ::=
<non-join query primary>
| <joined table>
<case expression> ::=
<case abbreviation>
| <case specification>
<case abbreviation> ::=
NULLIF <left paren> <value expression> <comma>
<value expression> <right paren>
| COALESCE <left paren> <value expression>
( <comma> <value expression> )... <right paren>
<case specification> ::=
<simple case>
| <searched case>
<simple case> ::=
CASE <case operand>
<simple when clause>...
[ <else clause> ]
END
<case operand> ::= <value expression>
<simple when clause> ::= WHEN <when operand> THEN <result>
<when operand> ::= <value expression>
<result> ::= <result expression> | NULL
<result expression> ::= <value expression>
<else clause> ::= ELSE <result>
<searched case> ::=
CASE
<searched when clause>...
[ <else clause> ]
END
<searched when clause> ::= WHEN <search condition> THEN <result>
<cast specification> ::=
CAST <left paren> <cast operand> AS
<cast target> <right paren>
<cast operand> ::=
<value expression>
| NULL
<cast target> ::=
<domain name>
| <data type>
<numeric value function> ::=
<position expression>
| <extract expression>
| <length expression>
<position expression> ::=
POSITION <left paren> <character value expression>
IN <character value expression> <right paren>
<character value expression> ::=
<concatenation>
| <character factor>
<concatenation> ::=
<character value expression> <concatenation operator>
<character factor>
<character factor> ::=
<character primary> [ <collate clause> ]
<character primary> ::=
<value expression primary>
| <string value function>
<string value function> ::=
<character value function>
| <bit value function>
<character value function> ::=
<character substring function>
| <fold>
| <form-of-use conversion>
| <character translation>
| <trim function>
<character substring function> ::=
SUBSTRING <left paren> <character value expression> FROM <start position>
[ FOR <string length> ] <right paren>
<start position> ::= <numeric value expression>
<string length> ::= <numeric value expression>
<fold> ::= ( UPPER | LOWER )
<left paren> <character value expression> <right paren>
<form-of-use conversion> ::=
CONVERT <left paren> <character value expression>
USING <form-of-use conversion name> <right paren>
<form-of-use conversion name> ::= <qualified name>
<character translation> ::=
TRANSLATE <left paren> <character value expression>
USING <translation name> <right paren>
<translation name> ::= <qualified name>
<trim function> ::=
TRIM <left paren> <trim operands> <right paren>
<trim operands> ::=
[ [ <trim specification> ] [ <trim character> ] FROM ] <trim source>
<trim specification> ::=
LEADING
| TRAILING
| BOTH
<trim character> ::= <character value expression>
<trim source> ::= <character value expression>
<bit value function> ::=
<bit substring function>
<bit substring function> ::=
SUBSTRING <left paren> <bit value expression> FROM <start position>
[ FOR <string length> ] <right paren>
<bit value expression> ::=
<bit concatenation>
| <bit factor>
<bit concatenation> ::=
<bit value expression> <concatenation operator> <bit factor>
<bit factor> ::= <bit primary>
<bit primary> ::=
<value expression primary>
| <string value function>
<extract expression> ::=
EXTRACT <left paren> <extract field>
FROM <extract source> <right paren>
<extract field> ::=
<datetime field>
| <time zone field>
<datetime field> ::=
<non-second datetime field>
| SECOND
<time zone field> ::=
TIMEZONE_HOUR
| TIMEZONE_MINUTE
<extract source> ::=
<datetime value expression>
| <interval value expression>
<datetime value expression> ::=
<datetime term>
| <interval value expression> <plus sign> <datetime term>
| <datetime value expression> <plus sign> <interval term>
| <datetime value expression> <minus sign> <interval term>
<interval term> ::=
<interval factor>
| <interval term 2> <asterisk> <factor>
| <interval term 2> <solidus> <factor>
| <term> <asterisk> <interval factor>
<interval factor> ::=
[ <sign> ] <interval primary>
<interval primary> ::=
<value expression primary> [ <interval qualifier> ]
<interval term 2> ::= <interval term>
<interval value expression> ::=
<interval term>
| <interval value expression 1> <plus sign> <interval term 1>
| <interval value expression 1> <minus sign> <interval term 1>
| <left paren> <datetime value expression> <minus sign>
<datetime term> <right paren> <interval qualifier>
<interval value expression 1> ::= <interval value expression>
<interval term 1> ::= <interval term>
<datetime term> ::=
<datetime factor>
<datetime factor> ::=
<datetime primary> [ <time zone> ]
<datetime primary> ::=
<value expression primary>
| <datetime value function>
<time zone> ::=
AT <time zone specifier>
<time zone specifier> ::=
LOCAL
| TIME ZONE <interval value expression>
<length expression> ::=
<char length expression>
| <octet length expression>
| <bit length expression>
<char length expression> ::=
( CHAR_LENGTH | CHARACTER_LENGTH )
<left paren> <string value expression> <right paren>
<string value expression> ::=
<character value expression>
| <bit value expression>
<octet length expression> ::=
OCTET_LENGTH <left paren> <string value expression> <right paren>
<bit length expression> ::=
BIT_LENGTH <left paren> <string value expression> <right paren>
<null specification> ::=
NULL
<default specification> ::=
DEFAULT
<row value constructor list> ::=
<row value constructor element>
[ ( <comma> <row value constructor element> )... ]
<row subquery> ::= <subquery>
<comp op> ::=
<equals operator>
| <not equals operator>
| <less than operator>
| <greater than operator>
| <less than or equals operator>
| <greater than or equals operator>
<between predicate> ::=
<row value constructor> [ NOT ] BETWEEN
<row value constructor> AND <row value constructor>
<in predicate> ::=
<row value constructor>
[ NOT ] IN <in predicate value>
<in predicate value> ::=
<table subquery>
| <left paren> <in value list> <right paren>
<in value list> ::=
<value expression> ( <comma> <value expression> )...
<like predicate> ::=
<match value> [ NOT ] LIKE <pattern>
[ ESCAPE <escape character> ]
<match value> ::= <character value expression>
<pattern> ::= <character value expression>
<escape character> ::= <character value expression>
<null predicate> ::= <row value constructor>
IS [ NOT ] NULL
<quantified comparison predicate> ::=
<row value constructor> <comp op> <quantifier> <table subquery>
<quantifier> ::= <all> | <some>
<all> ::= ALL
<some> ::= SOME | ANY
<exists predicate> ::= EXISTS <table subquery>
<unique predicate> ::= UNIQUE <table subquery>
<match predicate> ::=
<row value constructor> MATCH [ UNIQUE ]
[ PARTIAL | FULL ] <table subquery>
<overlaps predicate> ::=
<row value constructor 1> OVERLAPS <row value constructor 2>
<row value constructor 1> ::= <row value constructor>
<row value constructor 2> ::= <row value constructor>
<truth value> ::=
TRUE
| FALSE
| UNKNOWN
<constraint attributes> ::=
<constraint check time> [ [ NOT ] DEFERRABLE ]
| [ NOT ] DEFERRABLE [ <constraint check time> ]
<constraint check time> ::=
INITIALLY DEFERRED
| INITIALLY IMMEDIATE
<table constraint definition> ::=
[ <constraint name definition> ]
<table constraint> [ <constraint attributes> ]
<table constraint> ::=
<unique constraint definition>
| <referential constraint definition>
| <check constraint definition>
<unique constraint definition> ::=
<unique specification> even in SQL3)
<unique specification>
<left paren> <unique column list> <right paren>
<unique column list> ::= <column name list>
<referential constraint definition> ::=
FOREIGN KEY
<left paren> <referencing columns> <right paren>
<references specification>
<referencing columns> ::=
<reference column list>
<module contents> ::=
<declare cursor>
| <dynamic declare cursor>
| <procedure>
<declare cursor> ::=
DECLARE <cursor name> [ INSENSITIVE ] [ SCROLL ] CURSOR
FOR <cursor specification>
<cursor name> ::= <identifier>
<cursor specification> ::=
<query expression> [ <order by clause> ]
[ <updatability clause> ]
<order by clause> ::=
ORDER BY <sort specification list>
<sort specification list> ::=
<sort specification> [ ( <comma> <sort specification> )... ]
<sort specification> ::=
<sort key> [ <collate clause> ] [ <ordering specification> ]
<sort key> ::=
<column name>
| <unsigned integer>
<ordering specification> ::= ASC | DESC
<updatability clause> ::=
FOR
( READ ONLY |
UPDATE [ OF <column name list> ] )
<dynamic declare cursor> ::=
DECLARE <cursor name> [ INSENSITIVE ] [ SCROLL ] CURSOR
FOR <statement name>
<statement name> ::= <identifier>
<procedure> ::=
PROCEDURE <procedure name>
<parameter declaration list> <semicolon>
<SQL procedure statement> <semicolon>
<procedure name> ::= <identifier>
<parameter declaration list> ::=
<left paren> <parameter declaration>
[ ( <comma> <parameter declaration> )... ] <right paren>
| <parameter declaration>...
<parameter declaration> ::=
<parameter name> <data type>
| <status parameter>
<status parameter> ::=
SQLCODE | SQLSTATE
<SQL procedure statement> ::=
<SQL schema statement>
| <SQL data statement>
| <SQL transaction statement>
| <SQL connection statement>
| <SQL session statement>
| <SQL dynamic statement>
| <SQL diagnostics statement>
<SQL schema statement> ::=
<SQL schema definition statement>
| <SQL schema manipulation statement>
<SQL schema definition statement> ::=
<schema definition>
| <table definition>
| <view definition>
| <grant statement>
| <domain definition>
| <character set definition>
| <collation definition>
| <translation definition>
| <assertion definition>
<schema definition> ::=
CREATE SCHEMA <schema name clause>
[ <schema character set specification> ]
[ <schema element>... ]
<schema name clause> ::=
<schema name>
| AUTHORIZATION <schema authorization identifier>
| <schema name> AUTHORIZATION
<schema authorization identifier>
<schema authorization identifier> ::=
<authorization identifier>
<schema character set specification> ::=
DEFAULT CHARACTER
SET <character set specification>
<schema element> ::=
<domain definition>
| <table definition>
| <view definition>
| <grant statement>
| <assertion definition>
| <character set definition>
| <collation definition>
| <translation definition>
<domain definition> ::=
CREATE DOMAIN <domain name>
[ AS ] <data type>
[ <default clause> ]
[ <domain constraint>... ]
[ <collate clause> ]
<domain constraint> ::=
[ <constraint name definition> ]
<check constraint definition> [ <constraint attributes> ]
<table definition> ::=
CREATE [ ( GLOBAL | LOCAL ) TEMPORARY ] TABLE
<table name>
<table element list>
[ ON COMMIT ( DELETE | PRESERVE ) ROWS ]
<view definition> ::=
CREATE VIEW <table name> [ <left paren> <view column list>
<right paren> ]
AS <query expression>
[ WITH [ <levels clause> ] CHECK OPTION ]
<view column list> ::= <column name list>
<levels clause> ::=
CASCADED | LOCAL
<grant statement> ::=
GRANT <privileges> ON <object name>
TO <grantee> [ ( <comma> <grantee> )... ]
[ WITH GRANT OPTION ]
<privileges> ::=
ALL PRIVILEGES
| <action list>
<action list> ::= <action> [ ( <comma> <action> )... ]
<action> ::=
SELECT
| DELETE
| INSERT [ <left paren> <privilege column list> <right paren> ]
| UPDATE [ <left paren> <privilege column list> <right paren> ]
| REFERENCES [ <left paren> <privilege column list> <right paren> ]
| USAGE
<privilege column list> ::= <column name list>
<object name> ::=
[ TABLE ] <table name>
| DOMAIN <domain name>
| COLLATION <collation name>
| CHARACTER SET <character set name>
| TRANSLATION <translation name>
<grantee> ::=
PUBLIC
| <authorization identifier>
<assertion definition> ::=
CREATE ASSERTION <constraint name> <assertion check>
[ <constraint attributes> ]
<assertion check> ::=
CHECK
<left paren> <search condition> <right paren>
<character set definition> ::=
CREATE CHARACTER SET <character set name>
[ AS ]
<character set source>
[ <collate clause> | <limited collation definition> ]
<character set source> ::=
GET <existing character set name>
<existing character set name> ::=
<standard character repertoire name>
| <implementation-defined character repertoire name>
| <schema character set name>
<schema character set name> ::= <character set name>
<limited collation definition> ::=
COLLATION FROM <collation source>
<collation source> ::=
<collating sequence definition>
| <translation collation>
<collating sequence definition> ::=
<external collation>
| <schema collation name>
| DESC <left paren> <collation name> <right paren>
| DEFAULT
<external collation> ::=
EXTERNAL <left paren> <quote> <external collation name> <quote> <right paren>
<external collation name> ::=
<standard collation name>
| <implementation-defined collation name>
<standard collation name> ::= <collation name>
<implementation-defined collation name> ::= <collation name>
<schema collation name> ::= <collation name>
<translation collation> ::=
TRANSLATION <translation name>
[ THEN COLLATION <collation name> ]
<collation definition> ::=
CREATE COLLATION <collation name> FOR
<character set specification>
FROM <collation source>
[ <pad attribute> ]
<pad attribute> ::=
NO PAD
| PAD SPACE
<translation definition> ::=
CREATE TRANSLATION <translation name>
FOR <source character set specification>
TO <target character set specification>
FROM <translation source>
<source character set specification> ::= <character set specification>
<target character set specification> ::= <character set specification>
<translation source> ::=
<translation specification>
<translation specification> ::=
<external translation>
| IDENTITY
| <schema translation name>
<external translation> ::=
EXTERNAL <left paren> <quote> <external translation name> <quote> <right paren>
<external translation name> ::=
<standard translation name>
| <implementation-defined translation name>
<standard translation name> ::= <translation name>
<implementation-defined translation name> ::= <translation name>
<schema translation name> ::= <translation name>
<SQL schema manipulation statement> ::=
<drop schema statement>
| <alter table statement>
| <drop table statement>
| <drop view statement>
| <revoke statement>
| <alter domain statement>
| <drop domain statement>
| <drop character set statement>
| <drop collation statement>
| <drop translation statement>
| <drop assertion statement>
<drop schema statement> ::=
DROP SCHEMA <schema name> <drop behavior>
<drop behavior> ::= CASCADE | RESTRICT
<alter table statement> ::=
ALTER TABLE <table name> <alter table action>
<alter table action> ::=
<add column definition>
| <alter column definition>
| <drop column definition>
| <add table constraint definition>
| <drop table constraint definition>
<add column definition> ::=
ADD [ COLUMN ] <column definition>
<alter column definition> ::=
ALTER [ COLUMN ] <column name> <alter column action>
<alter column action> ::=
<set column default clause>
| <drop column default clause>
<set column default clause> ::=
SET <default clause>
<drop column default clause> ::=
DROP DEFAULT
<drop column definition> ::=
DROP [ COLUMN ] <column name> <drop behavior>
<add table constraint definition> ::=
ADD <table constraint definition>
<drop table constraint definition> ::=
DROP CONSTRAINT <constraint name> <drop behavior>
<drop table statement> ::=
DROP TABLE <table name> <drop behavior>
<drop view statement> ::=
DROP VIEW <table name> <drop behavior>
<revoke statement> ::=
REVOKE [ GRANT OPTION FOR ]
<privileges>
ON <object name>
FROM <grantee> [ ( <comma> <grantee> )... ] <drop behavior>
<alter domain statement> ::=
ALTER DOMAIN <domain name> <alter domain action>
<alter domain action> ::=
<set domain default clause>
| <drop domain default clause>
| <add domain constraint definition>
| <drop domain constraint definition>
<set domain default clause> ::= SET <default clause>
<drop domain default clause> ::= DROP DEFAULT
<add domain constraint definition> ::=
ADD <domain constraint>
<drop domain constraint definition> ::=
DROP CONSTRAINT <constraint name>
<drop domain statement> ::=
DROP DOMAIN <domain name> <drop behavior>
<drop character set statement> ::=
DROP CHARACTER SET <character set name>
<drop collation statement> ::=
DROP COLLATION <collation name>
<drop translation statement> ::=
DROP TRANSLATION <translation name>
<drop assertion statement> ::=
DROP ASSERTION <constraint name>
<SQL data statement> ::=
<open statement>
| <fetch statement>
| <close statement>
| <select statement: single row>
| <SQL data change statement>
<open statement> ::=
OPEN <cursor name>
<fetch statement> ::=
FETCH [ [ <fetch orientation> ] FROM ]
<cursor name> INTO <fetch target list>
<fetch orientation> ::=
NEXT
| PRIOR
| FIRST
| LAST
| ( ABSOLUTE | RELATIVE ) <simple value specification>
<simple value specification> ::=
<parameter name>
| <embedded variable name>
| <literal>
<fetch target list> ::=
<target specification> [ ( <comma> <target specification> )... ]
<target specification> ::=
<parameter specification>
| <variable specification>
<close statement> ::=
CLOSE <cursor name>
<select statement: single row> ::=
SELECT [ <set quantifier> ] <select list>
INTO <select target list>
<table expression>
<select target list> ::=
<target specification> [ ( <comma> <target specification> )... ]
<SQL data change statement> ::=
<delete statement: positioned>
| <delete statement: searched>
| <insert statement>
| <update statement: positioned>
| <update statement: searched>
<delete statement: positioned> ::=
DELETE FROM <table name>
WHERE CURRENT OF <cursor name>
<delete statement: searched> ::=
DELETE FROM <table name>
[ WHERE <search condition> ]
<insert statement> ::=
INSERT INTO <table name>
<insert columns and source>
<insert columns and source> ::=
[ <left paren> <insert column list> <right paren> ]
<query expression>
| DEFAULT VALUES
<insert column list> ::= <column name list>
<update statement: positioned> ::=
UPDATE <table name>
SET <set clause list>
WHERE CURRENT OF <cursor name>
<set clause list> ::=
<set clause> [ ( <comma> <set clause> )... ]
<set clause> ::=
<object column> <equals operator> <update source>
<object column> ::= <column name>
<update source> ::=
<value expression>
| <null specification>
| DEFAULT
<update statement: searched> ::=
UPDATE <table name>
SET <set clause list>
[ WHERE <search condition> ]
<SQL transaction statement> ::=
<set transaction statement>
| <set constraints mode statement>
| <commit statement>
| <rollback statement>
<set transaction statement> ::=
SET TRANSACTION <transaction mode>
[ ( <comma> <transaction mode> )... ]
<transaction mode> ::=
<isolation level>
| <transaction access mode>
| <diagnostics size>
<isolation level> ::=
ISOLATION LEVEL <level of isolation>
<level of isolation> ::=
READ UNCOMMITTED
| READ COMMITTED
| REPEATABLE READ
| SERIALIZABLE
<transaction access mode> ::=
READ ONLY
| READ WRITE
<diagnostics size> ::=
DIAGNOSTICS SIZE <number of conditions>
<number of conditions> ::= <simple value specification>
<set constraints mode statement> ::=
SET CONSTRAINTS <constraint name list>
( DEFERRED | IMMEDIATE )
<constraint name list> ::=
ALL
| <constraint name> [ ( <comma> <constraint name> )... ]
<commit statement> ::=
COMMIT [ WORK ]
<rollback statement> ::=
ROLLBACK [ WORK ]
<SQL connection statement> ::=
<connect statement>
| <set connection statement>
| <disconnect statement>
<connect statement> ::=
CONNECT TO <connection target>
<connection target> ::=
<SQL-server name>
[ AS <connection name> ]
correspondence with Tony Gordon)
[ USER <user name> ]
| DEFAULT
<SQL-server name> ::= <simple value specification>
<connection name> ::= <simple value specification>
<user name> ::= <simple value specification>
<set connection statement> ::=
SET CONNECTION <connection object>
<connection object> ::=
DEFAULT
| <connection name>
<disconnect statement> ::=
DISCONNECT <disconnect object>
<disconnect object> ::=
<connection object>
| ALL
| CURRENT
<SQL session statement> ::=
<set catalog statement>
| <set schema statement>
| <set names statement>
| <set session authorization identifier statement>
| <set local time zone statement>
<set catalog statement> ::=
SET CATALOG <value specification>
<value specification> ::=
<literal>
| <general value specification>
<set schema statement> ::=
SET SCHEMA <value specification>
<set names statement> ::=
SET NAMES <value specification>
<set session authorization identifier statement> ::=
SET SESSION AUTHORIZATION
<value specification>
<set local time zone statement> ::=
SET TIME ZONE
<set time zone value>
<set time zone value> ::=
<interval value expression>
| LOCAL
<SQL dynamic statement> ::=
<system descriptor statement>
| <prepare statement>
| <deallocate prepared statement>
| <describe statement>
| <execute statement>
| <execute immediate statement>
| <SQL dynamic data statement>
<system descriptor statement> ::=
<allocate descriptor statement>
| <deallocate descriptor statement>
| <set descriptor statement>
| <get descriptor statement>
<allocate descriptor statement> ::=
ALLOCATE DESCRIPTOR <descriptor name>
[ WITH MAX <occurrences> ]
<descriptor name> ::=
[ <scope option> ] <simple value specification>
<scope option> ::=
GLOBAL
| LOCAL
<occurrences> ::= <simple value specification>
<deallocate descriptor statement> ::=
DEALLOCATE DESCRIPTOR <descriptor name>
<set descriptor statement> ::=
SET DESCRIPTOR <descriptor name>
<set descriptor information>
<set descriptor information> ::=
<set count>
| VALUE <item number>
<set item information> [ ( <comma> <set item information> )... ]
<set count> ::=
COUNT <equals operator> <simple value specification 1>
<simple value specification 1> ::= <simple value specification>
<item number> ::= <simple value specification>
<set item information> ::=
<descriptor item name> <equals operator> <simple value specification 2>
<descriptor item name> ::=
TYPE
| LENGTH
| OCTET_LENGTH
| RETURNED_LENGTH
| RETURNED_OCTET_LENGTH
| PRECISION
| SCALE
| DATETIME_INTERVAL_CODE
| DATETIME_INTERVAL_PRECISION
| NULLABLE
| INDICATOR
| DATA
| NAME
| UNNAMED
| COLLATION_CATALOG
| COLLATION_SCHEMA
| COLLATION_NAME
| CHARACTER_SET_CATALOG
| CHARACTER_SET_SCHEMA
| CHARACTER_SET_NAME
<simple value specification 2> ::= <simple value specification>
<item number> ::= <simple value specification>
<get descriptor statement> ::=
GET DESCRIPTOR <descriptor name> <get descriptor information>
<get descriptor information> ::=
<get count>
| VALUE <item number>
<get item information> [ ( <comma> <get item information> )... ]
<get count> ::=
<simple target specification 1> <equals operator>
COUNT
<simple target specification 1> ::= <simple target specification>
<simple target specification> ::=
<parameter name>
| <embedded variable name>
<get item information> ::=
<simple target specification 2> <equals operator> <descriptor item name>>
<simple target specification 2> ::= <simple target specification>
<prepare statement> ::=
PREPARE <SQL statement name> FROM <SQL statement variable>
<SQL statement name> ::=
<statement name>
| <extended statement name>
<extended statement name> ::=
[ <scope option> ] <simple value specification>
<SQL statement variable> ::= <simple value specification>
<deallocate prepared statement> ::=
DEALLOCATE PREPARE <SQL statement name>
<describe statement> ::=
<describe input statement>
| <describe output statement>
<describe input statement> ::=
DESCRIBE INPUT <SQL statement name> <using descriptor>
<using descriptor> ::=
( USING | INTO ) SQL DESCRIPTOR <descriptor name>
<describe output statement> ::=
DESCRIBE [ OUTPUT ] <SQL statement name> <using descriptor>
<execute statement> ::=
EXECUTE <SQL statement name>
[ <result using clause> ]
[ <parameter using clause> ]
<result using clause> ::= <using clause>
<using clause> ::=
<using arguments>
| <using descriptor>
<using arguments> ::=
( USING | INTO ) <argument> [ ( <comma> <argument> )... ]
<argument> ::= <target specification>
<parameter using clause> ::= <using clause>
<execute immediate statement> ::=
EXECUTE IMMEDIATE <SQL statement variable>
<SQL dynamic data statement> ::=
<allocate cursor statement>
| <dynamic open statement>
| <dynamic fetch statement>
| <dynamic close statement>
| <dynamic delete statement: positioned>
| <dynamic update statement: positioned>
<allocate cursor statement> ::=
ALLOCATE <extended cursor name> [ INSENSITIVE ]
[ SCROLL ] CURSOR
FOR <extended statement name>
<extended cursor name> ::=
[ <scope option> ] <simple value specification>
<dynamic open statement> ::=
OPEN <dynamic cursor name> [ <using clause> ]
<dynamic cursor name> ::=
<cursor name>
| <extended cursor name>
<dynamic fetch statement> ::=
FETCH [ [ <fetch orientation> ] FROM ] <dynamic cursor name>
<using clause>
<dynamic close statement> ::=
CLOSE <dynamic cursor name>
<dynamic delete statement: positioned> ::=
DELETE FROM <table name>
WHERE CURRENT OF
<dynamic cursor name>
<dynamic update statement: positioned> ::=
UPDATE <table name>
SET <set clause>
[ ( <comma> <set clause> )... ]
WHERE CURRENT OF
<dynamic cursor name>
<SQL diagnostics statement> ::=
<get diagnostics statement>
<get diagnostics statement> ::=
GET DIAGNOSTICS <sql diagnostics information>
<sql diagnostics information> ::=
<statement information>
| <condition information>
<statement information> ::=
<statement information item> [ ( <comma> <statement information item> )... ]
<statement information item> ::=
<simple target specification> <equals operator> <statement information item name>
<statement information item name> ::=
NUMBER
| MORE
| COMMAND_FUNCTION
| DYNAMIC_FUNCTION
| ROW_COUNT
<condition information> ::=
EXCEPTION <condition number>
<condition information item> [ ( <comma> <condition information item> )... ]
<condition number> ::= <simple value specification>
<condition information item> ::=
<simple target specification> <equals operator> <condition information item name>
<condition information item name> ::=
CONDITION_NUMBER
| RETURNED_SQLSTATE
| CLASS_ORIGIN
| SUBCLASS_ORIGIN
| SERVER_NAME
| CONNECTION_NAME
| CONSTRAINT_CATALOG
| CONSTRAINT_SCHEMA
| CONSTRAINT_NAME
| CATALOG_NAME
| SCHEMA_NAME
| TABLE_NAME
| COLUMN_NAME
| CURSOR_NAME
| MESSAGE_TEXT
| MESSAGE_LENGTH
| MESSAGE_OCTET_LENGTH
<embedded SQL host program> ::=
<embedded SQL Ada program>
| <embedded SQL C program>
| <embedded SQL COBOL program>
| <embedded SQL Fortran program>
| <embedded SQL MUMPS program>
| <embedded SQL Pascal program>
| <embedded SQL PL/I program>
<embedded SQL Ada program> ::= !! <EMPHASIS>(See the Syntax Rules.)
<embedded SQL C program> ::=
!! <EMPHASIS>(See the Syntax Rules.)
<embedded SQL COBOL program> ::= !! <EMPHASIS>(See the Syntax Rules.)
<embedded SQL Fortran program> ::=
!! <EMPHASIS>(See the Syntax Rules.)
<embedded SQL MUMPS program> ::= !! <EMPHASIS>(See the Syntax Rules.)
<embedded SQL Pascal program> ::=
!! <EMPHASIS>(See the Syntax Rules.)
<embedded SQL PL/I program> ::= !! <EMPHASIS>(See the Syntax Rules.)
<embedded SQL declare section> ::=
<embedded SQL begin declare>
[ <embedded character set declaration> ]
[ <host variable definition>... ]
<embedded SQL end declare>
| <embedded SQL MUMPS declare>
<embedded SQL begin declare> ::=
<SQL prefix> BEGIN DECLARE SECTION
[ <SQL terminator> ]
<SQL prefix> ::=
EXEC SQL
| <ampersand>SQL<left paren>
<SQL terminator> ::=
END-EXEC
| <semicolon>
| <right paren>
<embedded character set declaration> ::=
SQL NAMES ARE <character set specification>
<host variable definition> ::=
<Ada variable definition>
| <C variable definition>
| <COBOL variable definition>
| <Fortran variable definition>
| <MUMPS variable definition>
| <Pascal variable definition>
| <PL/I variable definition>
<Ada variable definition> ::=
<Ada host identifier> [ ( <comma> <Ada host identifier> )... ] :
<Ada type specification> [ <Ada initial value> ]
<Ada type specification> ::=
<Ada qualified type specification>
| <Ada unqualified type specification>
<Ada qualified type specification> ::=
SQL_STANDARD.CHAR [ CHARACTER SET
[ IS ] <character set specification> ]
<left paren> 1 <double period> <length> <right paren>
| SQL_STANDARD.BIT
<left paren> 1 <double period> <length> <right paren>
| SQL_STANDARD.SMALLINT
| SQL_STANDARD.INT
| SQL_STANDARD.REAL
| SQL_STANDARD.DOUBLE_PRECISION
| SQL_STANDARD.SQLCODE_TYPE
| SQL_STANDARD.SQLSTATE_TYPE
| SQL_STANDARD.INDICATOR_TYPE
<Ada unqualified type specification> ::=
CHAR
<left paren> 1 <double period> <length> <right paren>
| BIT
<left paren> 1 <double period> <length> <right paren>
| SMALLINT
| INT
| REAL
| DOUBLE_PRECISION
| SQLCODE_TYPE
| SQLSTATE_TYPE
| INDICATOR_TYPE
<Ada initial value> ::=
<Ada assignment operator> <character representation>...
<Ada assignment operator> ::= <colon><equals operator>
<C variable definition> ::=
[ <C storage class> ]
[ <C class modifier> ]
<C variable specification>
<semicolon>
<C storage class> ::=
auto
| extern
| static
<C class modifier> ::= const | volatile
<C variable specification> ::=
<C numeric variable>
| <C character variable>
| <C derived variable>
<C numeric variable> ::=
( long | short | float | double )
<C host identifier> [ <C initial value> ]
[ ( <comma> <C host identifier> [ <C initial value> ] )... ]
<C initial value> ::=
<equals operator> <character representation>...
<C character variable> ::=
char [ CHARACTER SET
[ IS ] <character set specification> ]
<C host identifier>
<C array specification> [ <C initial value> ]
[ ( <comma> <C host identifier>
<C array specification>
[ <C initial value> ] )... ]
<C array specification> ::=
<left bracket> <length> <right bracket>
<C derived variable> ::=
<C VARCHAR variable>
| <C bit variable>
<C VARCHAR variable> ::=
VARCHAR [ CHARACTER SET [ IS ]
<character set specification> ]
<C host identifier>
<C array specification> [ <C initial value> ]
[ ( <comma> <C host identifier>
<C array specification>
[ <C initial value> ] )... ]
<C bit variable> ::=
BIT <C host identifier>
<C array specification> [ <C initial value> ]
[ ( <comma> <C host identifier>
<C array specification>
[ <C initial value> ] )... ]
<COBOL variable definition> ::=
(01|77) <COBOL host identifier> <COBOL type specification>
[ <character representation>... ] <period>
<COBOL type specification> ::=
<COBOL character type>
| <COBOL bit type>
| <COBOL numeric type>
| <COBOL integer type>
<COBOL character type> ::=
[ CHARACTER SET [ IS ]
<character set specification> ]
( PIC | PICTURE ) [ IS ] ( X [ <left paren> <length> <right paren> ] )...
<COBOL bit type> ::=
( PIC | PICTURE ) [ IS ]
( B [ <left paren> <length> <right paren> ] )...
<COBOL numeric type> ::=
( PIC | PICTURE ) [ IS ]
S <COBOL nines specification>
[ USAGE [ IS ] ] DISPLAY SIGN LEADING SEPARATE
<COBOL nines specification> ::=
<COBOL nines> [ V [ <COBOL nines> ] ]
| V <COBOL nines>
<COBOL nines> ::= ( 9 [ <left paren> <length> <right paren> ] )...
<COBOL integer type> ::=
<COBOL computational integer>
| <COBOL binary integer>
<COBOL computational integer> ::=
( PIC | PICTURE ) [ IS ] S<COBOL nines>
[ USAGE [ IS ] ] ( COMP | COMPUTATIONAL )
<COBOL binary integer> ::=
( PIC | PICTURE ) [ IS ] S<COBOL nines>
[ USAGE [ IS ] ] BINARY
<Fortran variable definition> ::=
<Fortran type specification>
<Fortran host identifier>
[ ( <comma> <Fortran host identifier> )... ]
<Fortran type specification> ::=
CHARACTER [ <asterisk> <length> ]
[ CHARACTER SET [ IS ]
<character set specification> ]
| BIT [ <asterisk> <length> ]
| INTEGER
| REAL
| DOUBLE PRECISION
<MUMPS variable definition> ::=
( <MUMPS numeric variable> | <MUMPS character variable> )
<semicolon>
<MUMPS numeric variable> ::=
<MUMPS type specification>
<MUMPS host identifier> [ ( <comma> <MUMPS host identifier> )... ]
<MUMPS type specification> ::=
INT
| DEC
[ <left paren> <precision> [ <comma> <scale> ] <right paren> ]
| REAL
<MUMPS character variable> ::=
VARCHAR <MUMPS host identifier> <MUMPS length specification>
[ ( <comma> <MUMPS host identifier> <MUMPS length specification> )... ]
<MUMPS length specification> ::=
<left paren> <length> <right paren>
<Pascal variable definition> ::=
<Pascal host identifier> [ ( <comma> <Pascal host identifier> )... ] <colon>
<Pascal type specification> <semicolon>
<Pascal type specification> ::=
PACKED ARRAY
<left bracket> 1 <double period> <length> <right bracket>
OF CHAR
[ CHARACTER SET [ IS ]
<character set specification> ]
| PACKED ARRAY
<left bracket> 1 <double period> <length> <right bracket>
OF BIT
| INTEGER
| REAL
| CHAR [ CHARACTER SET
[ IS ] <character set specification> ]
| BIT
<PL/I variable definition> ::=
(DCL | DECLARE)
( <PL/I host identifier>
| <left paren> <PL/I host identifier>
[ ( <comma> <PL/I host identifier> )... ] <right paren> )
<PL/I type specification>
[ <character representation>... ] <semicolon>
<PL/I type specification> ::=
( CHAR | CHARACTER ) [ VARYING ]
<left paren><length><right paren>
[ CHARACTER SET
[ IS ] <character set specification> ]
| BIT [ VARYING ] <left paren><length><right paren>
| <PL/I type fixed decimal> <left paren> <precision>
[ <comma> <scale> ] <right paren>
| <PL/I type fixed binary> [ <left paren> <precision> <right paren> ]
| <PL/I type float binary> <left paren> <precision> <right paren>
<PL/I type fixed decimal> ::=
( DEC | DECIMAL ) FIXED
| FIXED ( DEC | DECIMAL )
<PL/I type fixed binary> ::=
( BIN | BINARY ) FIXED
| FIXED ( BIN | BINARY )
<PL/I type float binary> ::=
( BIN | BINARY ) FLOAT
| FLOAT ( BIN | BINARY )
<embedded SQL end declare> ::=
<SQL prefix> END DECLARE SECTION
[ <SQL terminator> ]
<embedded SQL MUMPS declare> ::=
<SQL prefix>
BEGIN DECLARE SECTION
[ <embedded character set declaration> ]
[ <host variable definition>... ]
END DECLARE SECTION
<SQL terminator>
<embedded SQL statement> ::=
<SQL prefix>
<statement or declaration>
[ <SQL terminator> ]
<statement or declaration> ::=
<declare cursor>
| <dynamic declare cursor>
| <temporary table declaration>
| <embedded exception declaration>
| <SQL procedure statement>
<embedded exception declaration> ::=
WHENEVER <condition> <condition action>
<condition> ::=
SQLERROR | NOT FOUND
<condition action> ::=
CONTINUE | <go to>
<go to> ::=
( GOTO | GO TO ) <goto target>
<goto target> ::=
<host label identifier>
| <unsigned integer>
| <host PL/I label variable>
<host label identifier> ::= !!<EMPHASIS>(See the Syntax Rules.)
<host PL/I label variable> ::= !!<EMPHASIS>(See the Syntax Rules.)
<preparable statement> ::=
<preparable SQL data statement>
| <preparable SQL schema statement>
| <preparable SQL transaction statement>
| <preparable SQL session statement>
| <preparable implementation-defined statement>
<preparable SQL data statement> ::=
<delete statement: searched>
| <dynamic single row select statement>
| <insert statement>
| <dynamic select statement>
| <update statement: searched>
| <preparable dynamic delete statement: positioned>
| <preparable dynamic update statement: positioned>
<dynamic single row select statement> ::= <query specification>
<dynamic select statement> ::= <cursor specification>
<preparable dynamic delete statement: positioned> ::=
DELETE [ FROM <table name> ]
WHERE CURRENT OF <cursor name>
<preparable dynamic update statement: positioned> ::=
UPDATE [ <table name> ]
SET <set clause list>
WHERE CURRENT OF <cursor name>
<preparable SQL schema statement> ::=
<SQL schema statement>
<preparable SQL transaction statement> ::=
<SQL transaction statement>
<preparable SQL session statement> ::=
<SQL session statement>
<preparable implementation-defined statement> ::=
!! <EMPHASIS>(See the Syntax Rules.)
<direct SQL statement> ::=
<directly executable statement> <semicolon>
<directly executable statement> ::=
<direct SQL data statement>
| <SQL schema statement>
| <SQL transaction statement>
| <SQL connection statement>
| <SQL session statement>
| <direct implementation-defined statement>
<direct SQL data statement> ::=
<delete statement: searched>
| <direct select statement: multiple rows>
| <insert statement>
| <update statement: searched>
| <temporary table declaration>
<direct select statement: multiple rows> ::=
<query expression> [ <order by clause> ]
<direct implementation-defined statement> ::=
!!<EMPHASIS>(See the Syntax Rules)
<SQL object identifier> ::=
<SQL provenance> <SQL variant>
<SQL provenance> ::= <arc1> <arc2> <arc3>
<arc1> ::= iso | 1 | iso <left paren> 1 <right paren>
<arc2> ::= standard | 0 | standard <left paren> 0 <right paren>
<arc3> ::= 9075
<SQL variant> ::= <SQL edition> <SQL conformance>
<SQL edition> ::= <1987> | <1989> | <1992>
<1987> ::= 0 | edition1987 <left paren> 0 <right paren>
<1989> ::= <1989 base> <1989 package>
<1989 base> ::= 1 | edition1989 <left paren> 1 <right paren>
<1989 package> ::= <integrity no> | <integrity yes>
<integrity no> ::= 0 | IntegrityNo <left paren> 0 <right paren>
<integrity yes> ::= 1 | IntegrityYes <left paren> 1 <right paren>
<1992> ::= 2 | edition1992 <left paren> 2 <right paren>
<SQL conformance> ::= <low> | <intermediate> | <high>
<low> ::= 0 | Low <left paren> 0 <right paren>
<intermediate> ::= 1 | Intermediate <left paren> 1 <right paren>
<high> ::= 2 | High <left paren> 2 <right paren>
AM. Appendix B - SQL Tutorial for beginners
AM.1. Tutorial for PostgreSQL
SQL tutorial is also distributed with PostgreSQL. The SQL tutorial
scripts is in the directory src/tutorial
AM.2. Internet URL pointers
The SQL tutorial for beginners can be found at
� Jim Hoffman's tutorial <
http://w3.one.net/~jhoffman/sqltut.htm>
� Carnegie Mellon Univ <
http://www.heinz.cmu.edu/project/dbms> Go
here and click on 'technical'->'SQL_examples.html' and others.
� Concord Univ
<
http://www.cs.concordia.ca/Course_Notes/oracle/browser/node1.html>
Comments or suggestions? Mail to
� Jim Hoffman
[email protected]
The following are the sites suggested by John Hoffman:
� SQL Reference <
http://www.contrib.andrew.cmu.edu/~shadow/sql.html>
� Ask the SQL Pro <
http://www.inquiry.com/techtips/thesqlpro/>
� SQL Pro's Relational DB Useful Sites
<
http://www.inquiry.com/techtips/thesqlpro/usefulsites.html>
� Programmer's Source <
http://infoweb.magi.com/~steve/develop.html>
� DBMS Sites <
http://info.itu.ch/special/wwwfiles> Go here and see
file comp_db.html
� DB Ingredients <
http://www.compapp.dcu.ie/databases/f017.html>
� Web Authoring <
http://www.stars.com/Tutorial/CGI/>
� Computing Dictionary <
http://wfn-shop.princeton.edu/cgi-
bin/foldoc>
� DBMS Lab/Links <
http://www-ccs.cs.umass.edu/db.html>
� SQL FAQ
<
http://epoch.CS.Berkeley.EDU:8000/sequoia/dba/montage/FAQ> Go here
and see file SQL_TOC.html
� SQL Databases <
http://chaos.mur.csu.edu.au/itc125/cgi/sqldb.html>
� RIT Database Design Page
<
http://www.it.rit.edu/~wjs/IT/199602/icsa720/icsa720postings.html>
� Database Jump Site <
http://www.pcslink.com/~ej/dbweb.html>
� Programming Tutorials on the Web
<
http://www.eng.uc.edu/~jtilley/tutorial.html>
� Development Resources
<
http://www.ndev.com/ndc2/support/resources.htp>
� Query List <
http://ashok.pair.com/sql.htm>
� IMAGE SQL Miscellaneous
<
http://jazz.external.hp.com/training/sqltables/main.html>
� Internet Resource List <
http://www.eit.com/web/netservices.html>
AM.3. On-line SQL tutorials
Visit the following sites for on-line SQL tutorials
� SQL beginner course <
http://sqlcourse.com>
� SQL advanced course <
http://sqlcourse2.com>
AN. Appendix C - Linux Quick Install Instructions
If you are planning to use PostgreSQL on Linux, and need help in
installing Linux, then please visit the pointers given in this
Appendix. They cover the following topics -
� Salient Features of Linux - Why Linux is better as a database
server when compared with Windows 95/NT
� 10 minutes Linux Quick Install Instructions
� Microsoft-Linux Analogy List
� Quick Steps to Recompile the Linux Kernel
� Main site is at <
http://www.aldev.8m.com> and mirrors at webjump
<
http://aldev.webjump.com>, angelfire
<
http://www.angelfire.com/nv/aldev>, geocities
<
http://www.geocities.com/alavoor/index.html>, virtualave
<
http://aldev.virtualave.net>, bizland <
http://aldev.bizland.com>,
theglobe <
http://members.theglobe.com/aldev/index.html>, spree
<
http://members.spree.com/technology/aldev>, infoseek
<
http://homepages.infoseek.com/~aldev1/index.html>, bcity
<
http://www3.bcity.com/aldev>, 50megs <
http://aldev.50megs.com>
AO. Appendix C - Midgard Installation
RPMs for Midgard from <
http://www.midgard-
project.org/download/binaries> currently do not include PostgreSQL,
and hence you need to install from the source tar ball file .
Download the Midgard source tarball and read the INSTALL.REDHAT file -
______________________________________________________________________
bash# cd midgard-lib-1.4beta6
bash# ./configure --prefix=/usr/local --with-mysql=/usr/local --includedir=/usr/include/mysql --with-midgard=/usr/local --with-pgsql=/var/lib/pgsql --includedir=/usr/include/pgsql
bash# make
bash# make install
bash# ldconfig -v | grep -i midga
Copy the header files, just in case make install did not do that..
bash# cp *.h /usr/local/include
bash# cd ../mod_midgard-1.4beta5c
bash# ./configure --prefix=/usr/local --with-mysql=/usr/local --includedir=/usr/include/mysql --with-midgard=/usr --with-pgsql=/var/lib/pgsql --includedir=/usr/include/pgsql
bash# make
bash# make install
#modify apache line to correct /usr/.....
bash# vi /etc/httpd/conf/httpd.conf (or it is /etc/apache/httpd.conf)
bash# /etc/init.d/apache restart
#apache should restart!!!
bash# cd ../midgard-php-1.4beta6
bash# ./configure '--with-apxs' '--with-mysql' '--with-pgsql' '--with-midgard' --prefix=/usr/local --with-midgard=/usr/local
bash# gvim Makefile
And add -I/usr/include/pgsql to INCLUDE variable.
Also add $(INCLUDE) to $(APXS) command as below -
libphp3.so: mod_php3.c libmodphp3-so.a pcrelib/libpcre.a midgard/libphpmidgard.a
-@test -f ./mod_php3.c || test -L ./mod_php3.c || $(LN_S) $(srcdir)/mod_php3.c ./mod_php3.c
-@test -f ./mod_php3.c || test -h ./mod_php3.c || $(LN_S) $(srcdir)/mod_php3.c ./mod_php3.c
$(APXS) -c -o libphp3.so -I$(srcdir) $(INCLUDE) -I. -I/usr/local/include -I/usr/lib/glib/include -Wl,'-rpath /usr/local/lib' ./mod_php3.c libmodphp3-so.a $(APXS_LDFLAGS)
bash# make
bash# make install
#modify apache line to correct /usr/.....
# and add lines like these -
LoadModule php4_module modules/libphp4.so
AddModule mod_php4.c
LoadModule php4_module lib/apache/libphp4.so
<IfModule mod_php4.c>
AddType application/x-httpd-php4 .php4
AddType application/x-httpd-php4 .php
AddType application/x-httpd-php4-source .phps
AddType application/x-httpd-php .php
</IfModule>
bash# vi /etc/httpd/conf/httpd.conf (or it is /etc/apache/httpd.conf)
bash# /etc/init.d/apache restart
#apache should restart!!!
______________________________________________________________________
AO.1. Testing Midgard PHP Server
To test the installation do this - Create a file in your document root
directory. I usually call it info.php and in it put this single line:
______________________________________________________________________
<?phpinfo()?>
______________________________________________________________________
Then load it up in your browser:
http://localhost/info.php
You should see a nice summary page showing all sorts of information
about your setup. You probably shouldn't leave this file around on a
production server, but for debugging and general info during
development, it is very handy.
AO.2. Security OpenSSL
You may also need to get the RSA package for to enable SSL encryption
from <
ftp://ftp.deva.net/pub/sources/crypto/rsaref20.1996.tar.Z> See
also OpenSSL RPM package on Linux cdrom ( <
http://www.openssl.org>
If you do not want the SSL to be enabled (or if you face any problem),
then download the source RPM of Apache-Midgard and edit the *.spec
file and comment out SSL and rebuild the RPM.
