From: Jeff Fried <[email protected]>
Subject: Re: Where is SQL syntax spec
To: Tim Bunce <[email protected]>
Date: Tue, 24 May 94 15:57:39 PDT
In-Reply-To: <[email protected]>; from "Tim Bunce" at May 24, 94 6:59 pm

Tim,

  I thought i'd add to life's complexity by appending a copy of the
SQL3 bnf.  SQL3 is a superset of SQL-92 [which is a superset of SQL-89
level 2].  SQL3 is not yet a standard, but SQL-92 is a standard.  In
fact ENTRY LEVEL SQL-92 is the "current" implementation state of most
vendors.  There are only a few differences between SQL-92 ENTRY LEVEL
and SQL-89 Level II, but two of them are very important:

  - Delimited identifiers

  - The handling of the WITH CHECK option on views defaults to
    CASCADE.  In SQL-89 the default was [effectively] LOCAL.

.. jeff

>
for the  language done at about  1-SEP-1993 15:13:55.88.
The specific version of the BNF included here is:  ANSI-only, SQL3-only.


<SQL terminal character> ::=
   <SQL 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>
   | <left bracket>
   | <right bracket>
   | <circumflex>
   | <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> ::= ?

<left bracket> ::= [

<right bracket> ::= ]

<circumflex> ::= ^

<underscore> ::= _

<vertical bar> ::= |

<separator> ::= { <comment> | <space> | <newline> }...

<comment> ::=
     <simple comment>
   | <bracketed comment>

<simple comment> ::=
   <simple comment introducer> [ <comment character>... ] <newline>

<simple comment introducer> ::= <minus sign><minus sign>[<minus sign>...]

<comment character> ::=
     <nonquote character>
   | <quote>

<nonquote character> ::= !! <EMPHASIS>(See the Syntax Rules.)

<newline> ::= !! <EMPHASIS>(implementation-defined end-of-line indicator)

<bracketed comment> ::=             !! (<EMPHASIS>(See the Syntax Rules))
   <bracketed comment introducer>
     <bracketed comment contents>
   <bracketed comment terminator>

<bracketed comment introducer> ::= <solidus><asterisk>

<bracketed comment contents> ::=
   [ { <comment character> | <separator> }... ]

<bracketed comment terminator> ::= <asterisk><solidus>

<token> ::=
     <nondelimiter token>
   | <delimiter token>

<nondelimiter token> ::=
     <regular identifier>
   | <key word>
   | <unsigned numeric literal>
   | <national character string literal>
   | <bit string literal>
   | <hex string literal>
   | <user-defined operator symbol>

<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 | ACTOR | ADD | AFTER | ALIAS
   | ALL | ALLOCATE | ALTER
   | AND | ANY | ARE
   | AS | ASC | ASSERTION
   | ASYNC | AT
   | ATTRIBUTES
   | AUTHORIZATION | AVG
   | BEFORE | BEGIN | BETWEEN | BIT | BIT_LENGTH
   | BOOLEAN | BOTH | BREADTH | BY
   | CASCADE | CASCADED | CASE | CAST
   | CATALOG
   | CHAR | CHARACTER
   | CHAR_LENGTH | CHARACTER_LENGTH | CHECK | CLASS | CLOSE | COALESCE
   | COLLATE
   | COLLATION | COLUMN | COMMIT | COMPLETION
   | CONNECT | CONNECTION | CONSTRAINT
   | CONSTRAINTS | CONSTRUCTOR | CONTINUE | CONVERT | CORRESPONDING
   | COUNT
   | CREATE | CROSS | CURRENT | CURRENT_DATE
   | CURRENT_PATH
   | CURRENT_TIME
   | CURRENT_TIMESTAMP | CURRENT_USER | CURSOR | CYCLE
   | DATA | DATE | DAY | DEALLOCATE
   | DEC | DECIMAL | DECLARE | DEFAULT
   | DEFERRABLE | DEFERRED | DELETE | DEPTH
   | DESC | DESCRIBE
   | DESCRIPTOR
   | DESIGNATOR
   | DESTROY | DESTRUCTOR | DICTIONARY
   | DIAGNOSTICS | DISCONNECT | DISTINCT | DOMAIN
   | DOUBLE | DROP
   | EACH
   | ELEMENT
   | ELSE
   | END | END-EXEC | EQUALS
   | ESCAPE | EXCEPT
   | EXEC | EXECUTE | EXISTS | EXTERNAL | EXTRACT
   | FACTOR
   | FALSE | FETCH | FIRST | FLOAT | FOR | FOREIGN
   | FOUND | FROM | FULL
   | FUNCTION
   | GENERAL | GET | GLOBAL | GO | GOTO
   | GRANT | GROUP
   | HAVING | HOUR
   | IDENTITY | IGNORE | IMMEDIATE
   | IN | INDICATOR
   | INITIALLY | INNER | INOUT
   | INPUT | INSENSITIVE | INSERT
   | INSTEAD
   | INT | INTEGER | INTERSECT | INTERVAL
   | INTO | IS | ISOLATION
   | JOIN
   | KEY
   | LANGUAGE | LAST | LEADING | LEFT
   | LESS | LEVEL | LIKE | LIMIT
   | LIST
   | LOCAL | LOWER
   | MATCH | MAX | MIN | MINUTE | MODIFY | MODULE
   | MONTH
   | MOVE | MULTISET
   | NAMES | NATIONAL | NATURAL | NCHAR | NEW
   | NEW_TABLE
   | NEXT | NO
   | NONE | NOT| NULL | NULLIF | NUMERIC
   | OCTET_LENGTH | OF | OFF
   | OID | OLD
   | OLD_TABLE
   | ON | ONLY | OPEN | OPERATION
   | OPERATOR
   | OPERATORS
   | OPTION | OR | ORDER
   | OUT | OUTER | OUTPUT | OVERLAPS
   | PAD | PARAMETERS | PARTIAL
   | PATH
   | PENDANT | POSITION | POSTFIX | PRECISION | PREFIX
   | PREORDER | PREPARE | PRESERVE | PRIMARY | PRIOR | PRIVATE
   | PRIVILEGES | PROCEDURE | PROTECTED | PUBLIC
   | READ | REAL | RECURSIVE
   | REFERENCES | REFERENCING | RELATIVE | REPRESENTATION
   | RESTRICT | REVOKE | RIGHT
   | ROLE | ROLLBACK
   | ROUTINE
   | ROW | ROWS
   | SAVEPOINT | SCHEMA | SCROLL | SEARCH | SECOND | SECTION
   | SELECT
   | SENSITIVE
   | SEQUENCE
   | SESSION | SESSION_USER | SET
   | SIMILAR | SIZE | SMALLINT | SOME | SPACE | SPECIFIC
   | SQL | SQLCODE
   | SQLERROR | SQLEXCEPTION | SQLSTATE | SQLWARNING
   | START | STATE
   | STRUCTURE
   | SUBSTRING | SUM
   | SYMBOL
   | SYSTEM_USER
   | TABLE | TEMPLATE | TEMPORARY
   | TERM
   | TEST | THAN
   | THEN | THERE | TIME | TIMESTAMP
   | TIMEZONE_HOUR
   | TIMEZONE_MINUTE | TO | TRAILING | TRANSACTION
   | TRANSLATE | TRANSLATION
   | TRIGGER | TRIM | TRUE | TYPE
   | UNDER | UNION | UNIQUE | UNKNOWN
   | UPDATE | UPPER | USAGE | USER | USING
   | VALUE | VALUES | VARCHAR | VARIABLE | VARIANT
   | VARYING | VIEW
   | VIRTUAL | VISIBLE
   | WAIT | WHEN | WHENEVER | WHERE
   | WITH | WITHOUT
   | WORK | WRITE
   | YEAR
   | ZONE

<non-reserved word> ::=
     ADA
   | C | CATALOG_NAME
   | CHAIN
   | 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
   | HOLD
   | KEY_MEMBER | KEY_TYPE
   | LENGTH
   | MESSAGE_LENGTH | MESSAGE_OCTET_LENGTH | MESSAGE_TEXT | MORE | MUMPS
   | NAME | NULLABLE | NUMBER
   | PASCAL | PLI
   | REPEATABLE | RETURNED_LENGTH | RETURNED_OCTET_LENGTH | RETURNED_SQLSTATE
   | ROUTINE_CATALOG | ROUTINE_NAME | ROUTINE_SCHEMA | ROW_COUNT
   | SCALE | SCHEMA_NAME | SERIALIZABLE | SERVER_NAME | SPECIFIC_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>

<quote symbol> ::= <quote><quote>

<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

<user-defined operator symbol> ::= !! <EMPHASIS>(See the Syntax Rules)

<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>
   | <double colon>
   | <assignment operator>
   | <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> ::= ..

<double colon> ::= ::

<assignment operator> ::= :=

<SQL-client module definition> ::= <module>

<module> ::=
   <module name clause>
     <module remainder>
   [ END MODULE ]

<module name clause> ::=
   MODULE [ <module name> ]

<module name> ::=
     <SQL-server module name>
   | <SQL-client module name>

<SQL-server module name> ::= <qualified identifier>

<qualified identifier> ::= <identifier>

<SQL-client module name> ::= <identifier>

<module remainder> ::=
   [ <module character set specification> ]
   <language clause>
   <module authorization clause>
     [ <module path specification> ]
   <module contents>...

<module character set specification> ::=
   NAMES ARE <character set specification>

<language clause> ::=
   LANGUAGE <language name>

<language name> ::=
   ADA | C | COBOL | FORTRAN | MUMPS | PASCAL | PLI | SQL

<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>

<module path specification> ::=
   PATH <schema name list>

<schema name list> ::=
   <schema name> [ { <comma> <schema name> }... ]

<module contents> ::=
     <global declaration> [ <semicolon> ]
   | <routine>

<global declaration> ::=
     <declare cursor>
   | <temporary abstract data type declaration>
   | <temporary table declaration>
   | <temporary view declaration>

<declare cursor> ::=
   DECLARE <cursor name> [ <cursor sensitivity> ]
     [ SCROLL ] CURSOR
     [ WITH HOLD ]
     FOR <cursor specification>
<cursor sensitivity> ::=
     SENSITIVE
   | INSENSITIVE

<cursor name> ::= <local qualified name>

<local qualified name> ::=
   [ <local qualifier> <period> ] <qualified identifier>

<local qualifier> ::= MODULE

<cursor specification> ::=
   <query expression> [ <order by clause> ]
     [ <updatability clause> ]

<query expression> ::=
   <possibly updatable query expression> [ <trigger definition>... ]

<possibly updatable 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>
   | <recursive union>

<non-join query primary> ::=
     <simple table>
   | <left paren> <non-join query expression> <right paren>

<simple table> ::=
     <query specification>
   | <table value designator>
   | <explicit table>
   | <collection expression>

<query specification> ::=
   SELECT [ <set quantifier> ] <select list>
     <table expression>

<set quantifier> ::= DISTINCT | ALL

<select list> ::=
     <asterisk>
   | <select sublist> [ { <comma> <select sublist> }... ]

<select sublist> ::=
     <derived column>
   | <qualifier> <period> <asterisk>

<derived column> ::=
   <value expression> [ <as clause> ]

<value expression> ::=
     <numeric value expression>
   | <string value expression>
   | <datetime value expression>
   | <interval value expression>
   | <enumerated value expression>
   | <boolean value expression>
   | <attributes function>
   | <abstract data type value expression>
   | <table value expression>
   | <collection 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>
   | <row reference>
   | <set function specification>
   | <table 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 literal> ::=
     <character string literal>
   | <national character string literal>
   | <bit string literal>
   | <hex string literal>
   | <datetime literal>
   | <interval literal>
   | <enumeration literal>
   | <boolean literal>
   | <oid 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>

<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> ]

<enumeration literal> ::=
   <domain name> <double colon> <enumeration name>

<domain name> ::= <schema qualified name>

<schema qualified name> ::=
   [ <schema name> <period> ] <qualified identifier>

<enumeration name> ::= <identifier>

<boolean literal> ::=
     TRUE
   | FALSE

<oid literal> ::= OID <oid string>

<oid string> ::= <quote> <oid value> <quote>

<oid value> ::= <character representation>...

<general value specification> ::=
     <item reference>
   | USER
   | CURRENT_USER
   | SESSION_USER
   | SYSTEM_USER
   | CURRENT_PATH
   | VALUE
   | <function invocation>
   | <attribute reference>
   | <template parameter name>

<item reference> ::=
   <parameter name> [ <indicator parameter> ]

<parameter name> ::= <colon> <identifier>

<indicator parameter> ::= [ INDICATOR ] <parameter name>

<function invocation> ::= <routine invocation>

<routine invocation> ::=
   <routine name> <argument list>

<routine name> ::= <local or schema qualified name>

<local or schema qualified name> ::=
   [ <local or schema qualifier> <period> ] <qualified identifier>

<local or schema qualifier> ::=
     <schema name>
   | MODULE

<argument list> ::=
     <left paren> <positional arguments> <comma> <keyword arguments> <right paren>
   | <left paren> <positional arguments> <right paren>
   | <left paren> <keyword arguments> <right paren>
   | <left paren> <right paren>

<positional arguments> ::=
   <argument> [ { <comma> <argument> }... ]

<argument> ::=
     <value expression>
   | <generalized expression>

<generalized expression> ::=
   <value expression> AS <abstract data type name>

<abstract data type name> ::= <local or schema qualified name>
<attribute name> ::=
     <identifier>
   | OID

<keyword arguments> ::=
   <keyword argument> [ { <comma> <keyword argument> }... ]

<keyword argument> ::=
   <parameter name> <keyword parameter tag> <argument>

<keyword parameter tag> ::= =>

<attribute reference> ::=
   <value specification> <period> <attribute name>

<value specification> ::=
     <literal>
   | <general value specification>

<literal> ::=
     <signed numeric literal>
   | <general literal>

<signed numeric literal> ::=
   [ <sign> ] <unsigned numeric literal>

<template parameter name> ::= <colon> <identifier>

<column reference> ::= [ <qualifier> <period> ] <column name>

<qualifier> ::=
     <table name>
   | <correlation name>

<table name> ::=
     <local or schema qualified name>

<correlation name> ::= <identifier>

<column name> ::=
     <identifier>
   | OID

<row reference> ::= ROW <qualifier>

<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

<table subquery> ::= <subquery>

<subquery> ::= <left paren> <query expression> <right paren>

<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>

<search condition> ::=
   <boolean value expression>

<boolean value expression> ::=
     <boolean term>
   | <boolean value expression> OR <boolean term>

<boolean term> ::=
     <boolean factor>
   | <boolean term> AND <boolean factor>

<boolean factor> ::=
   [ NOT ] <boolean primary>

<boolean primary> ::=
     <predicate>
   | <value expression primary>

<predicate> ::=
     <comparison predicate>
   | <between predicate>
   | <in predicate>
   | <like predicate>
   | <null predicate>
   | <quantified comparison predicate>
   | <exists predicate>
   | <unique predicate>
   | <match predicate>
   | <overlaps predicate>
   | <similar predicate>
   | <quantified predicate>
   | <there is predicate>
   | <distinct predicate>
   | <boolean predicate>

<comparison predicate> ::=
   <row value designator> <comp op> <row value designator>

<row value designator> ::=
      <row value designator element>
   | <left paren> <row value designator list> <right paren>
   | <row subquery>

<row value designator element> ::=
     <value expression>
   | <null specification>
   | <default specification>

<null specification> ::=
   NULL [ <left paren> <null state> <right paren> ]

<null state> ::= <identifier>

<default specification> ::=
   DEFAULT

<row value designator list> ::=
   <row value designator element>
       [ { <comma> <row value designator 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 designator> [ NOT ] BETWEEN
     <row value designator> AND <row value designator>

<in predicate> ::=
   <row value designator>
     [ 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>

<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>
   | <regular expression 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>

<regular expression substring function> ::=
   SUBSTRING <left paren> <character value expression> FROM
               <character value expression> FOR
                     <escape character> <right paren>

<escape character> ::= <character 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> ::= <schema qualified name>

<character translation> ::=
   TRANSLATE <left paren> <character value expression>
       USING <translation name> <right paren>

<translation name> ::= <schema 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>

<collate clause> ::= COLLATE <collation name>

<collation name> ::= <schema qualified name>

<pattern> ::= <character value expression>

<null predicate> ::= <row value designator>
   IS [ NOT ] NULL
       [ <left paren> <null values specification> <right paren> ]

<null values specification> ::= <asterisk> | <null state>

<quantified comparison predicate> ::=
   <row value designator> <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 designator> MATCH [ UNIQUE ]
       [ PARTIAL | FULL ] <table subquery>

<overlaps predicate> ::=
   <row value designator 1> OVERLAPS <row value designator 2>

<row value designator 1> ::= <row value designator>

<row value designator 2> ::= <row value designator>

<row value designator 1> ::= <row value designator>

<row value designator 2> ::= <row value designator>

<similar predicate> ::=
   <match value> [ NOT ] SIMILAR TO
       <similar pattern>
     [ ESCAPE <escape character> ]

<similar pattern> ::= <character value expression>

<quantified predicate> ::=
     <existential clause> <left paren> <search condition> <right paren>
   | <universal clause> <left paren> <search condition> <right paren>
   | <quantified comparison predicate>

<existential clause> ::=
   FOR SOME <table reference list>

<table reference list> ::=
   <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>

<column name list> ::=
   <column name> [ { <comma> <column name> }... ]

<derived table> ::= <table 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>
   | <constraint join>

<join condition> ::= ON <search condition>

<named columns join> ::=
   USING <left paren> <join column list> <right paren>

<join column list> ::= <column name list>

<constraint join> ::=
   | USING PRIMARY KEY
   | USING FOREIGN KEY
   | USING CONSTRAINT <constraint name>

<constraint name> ::= <schema qualified name>

<universal clause> ::=
   FOR ALL <table reference list>

<there is predicate> ::=
   <left paren> <there is clause> <where clause> <right paren>

<there is clause> ::=
   THERE IS <table reference list>

<where clause> ::= WHERE <search condition>

<distinct predicate> ::=
   <row value designator 1> IS DISTINCT FROM
       <row value designator 2>

<boolean predicate> ::=
   <boolean value expression> [ IS [ NOT ]
         <truth value> ]

<truth value> ::=
     TRUE
   | FALSE
   | UNKNOWN

<cast specification> ::=
   CAST <left paren> <cast operand> AS
       <cast target> <right paren>

<cast operand> ::=
     <value expression>
   | NULL

<cast target> ::=
     <domain name>
   | <data type>

<data type> ::=
     <predefined type>
   | <abstract data type name>
   | <generated type reference>
   | <template parameter name>
   | <collection type>

<predefined type> ::=
     <character string type>
          [ CHARACTER SET <character set specification> ]
   | <national character string type>
   | <bit string type>
   | <numeric type>
   | <enumerated type>
   | <boolean 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

<enumerated type> ::=
   <left paren> <enumeration name list> <right paren>

<enumeration name list> ::=
   <enumeration name> [ { <comma> <enumeration name> }... ]

<boolean type> ::= BOOLEAN

<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>

<generated type reference> ::=
   <type template name> <template parameter list>

<type template name> ::= <schema qualified name>

<template parameter list> ::=
   <left paren>
     <template parameter> [ { <comma> <template parameter> }... ]
   <right paren>

<template parameter> ::=
     <value specification>
   | <data type>

<collection type> ::=
     <set type>
   | <multiset type>
   | <list type>

<set type> ::= SET <left paren> <data type> <right paren>

<multiset type> ::= MULTISET <left paren> <data type> <right paren>

<list type> ::= LIST <left paren> <data type> <right paren>

<numeric value function> ::=
     <position expression>
   | <extract expression>
   | <length expression>

<position expression> ::=
   POSITION <left paren> <character value expression>
       IN <character value expression> <right paren>

<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>

<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> ]

<time zone> ::=
   AT <time zone specifier>

<time zone specifier> ::=
     LOCAL
   | TIME ZONE <interval primary>

<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>

<enumerated value expression> ::=
     <domain name> <left paren> <value expression> <right paren>
   | <enumerated primary>

<enumerated primary> ::=
     <value expression primary>

<attributes function> ::=
   ATTRIBUTES
     <left paren> <abstract data type value expression> <right paren>

<abstract data type value expression> ::= <ADT expression>

<ADT expression> ::=
   <ADT term>
   | <ADT expression> <term operator> <ADT term>

<term operator> ::= <ADT operator>

<ADT operator> ::= <user-defined operator symbol)

<ADT term> ::=
   <ADT factor>
   | <ADT term> <factor operator> <ADT factor>

<factor operator> ::= <ADT operator>

<ADT factor> ::=
   <ADT primary>
   | <prefix operator> <ADT primary>
   | <ADT primary> <postfix operator>

<ADT primary> ::=
   <value expression primary>

<prefix operator> ::= <ADT operator>

<postfix operator> ::= <ADT operator>

<table value expression> ::=
   <table type>
     <left paren>
       [ <value expression> [ { <comma> <value expression> }... ] ]
     <right paren>

<table type> ::=
     TABLE
   | SET
   | LIST

<collection value expression> ::=
     <set value designator>
   | <multiset value designator>
   | <list value designator>

<set value designator> ::=
   SET <left paren> [ <collection list> ] <right paren>

<collection list> ::=
   <collection element> [ { <comma> <collection element> }... ]

<collection element> ::= <value expression>

<multiset value designator> ::=
   MULTISET <left paren> [ <collection list> ] <right paren>

<list value designator> ::=
   LIST <left paren> [ <collection list> ] <right paren>

<as clause> ::= [ AS ] <column name>

<table expression> ::=
   <from clause>
   [ <where clause> ]
   [ <group by clause> ]
   [ <having clause> ]

<from clause> ::= FROM <table reference>
   [ { <comma> <table reference> }... ]

<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> ]

<having clause> ::= HAVING <search condition>

<table value designator> ::=
   VALUES <table value designator list>

<table value designator list> ::=
   <row value designator> [ { <comma> <row value designator> }... ]

<explicit table> ::= <table type> <table name>

<collection expression> ::=
   <value expression>

<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>

<recursive union> ::=
   <left paren> <initial expression>
     RECURSIVE UNION <correlation name list>
         [ <left paren> <recursive column list> <right paren> ]
     <iteration expression>
     [ <search clause> ]
     [ <cycle clause> ]
     [ <limit clause> ] <right paren>

<initial expression> ::= <query expression>

<correlation name list> ::=
   <correlation name> [ { <comma> <correlation name> }... ]

<recursive column list> ::= <column name list>

<iteration expression> ::= <query expression>

<search clause> ::=
   SEARCH <search order> SET <sequence column>

<search order> ::=
     PREORDER
   | { DEPTH | BREADTH } FIRST BY <sort specification list>

<sort specification list> ::=
   <sort specification> [ { <comma> <sort specification> }... ]

<sort specification> ::=
   <sort key> [ <collate clause> ] [ <ordering specification> ]

<sort key> ::=
   <value expression>

<ordering specification> ::= ASC | DESC

<sequence column> ::= <column name>

<cycle clause> ::=
   CYCLE [ <cycle column list> ]
     SET <cycle mark column>
         [ TO <cycle mark value> ]

<cycle column list> ::=
   <cycle column> [ { <comma> <cycle column> }... ]

<cycle column> ::= <column name>

<cycle mark column> ::= <column name>

<cycle mark value> ::= <value expression>

<limit clause> ::=
   [ RETURN | EXCEPTION ] LIMIT
       <left paren> <value specification> <right paren>

<trigger definition> ::=
   [ CREATE ] TRIGGER [ <trigger name> ]
     <trigger action time> <trigger event>
       [ ON <table name> ]
       [ ORDER <order value> ]
       [ REFERENCING <old or new values alias list> ]
     <triggered action>

<trigger name> ::= <schema qualified name>

<trigger action time> ::=
     BEFORE
   | AFTER
   | INSTEAD OF

<trigger event> ::=
     INSERT
   | DELETE
   | UPDATE [ OF <trigger column list> ]

<trigger column list> ::= <column name list>

<order value> ::= <unsigned integer>

<old or new values alias list> ::=
   <old or new values alias>...

<old or new values alias> ::=
     OLD [ AS ]
         <old values correlation name>
   | NEW [ AS ]
         <new values correlation name>
   | OLD_TABLE [ AS ]
         <old values table alias>
   | NEW_TABLE [ AS ]
         <new values table alias>

<old values correlation name> ::= <correlation name>

<new values correlation name> ::= <correlation name>

<old values table alias> ::= <identifier>

<new values table alias> ::= <identifier>

<triggered action> ::=
   [ FOR EACH { ROW | STATEMENT } ]
     [ WHEN <left paren> <search condition> <right paren> ]
     <triggered SQL statement>

<triggered SQL statement> ::=
   <SQL procedure statement> <semicolon>

<SQL procedure statement> ::=
   [ ASYNC <left paren> <async statement identifier> <right paren> ]
         <SQL executable statement>

<async statement identifier> ::= <numeric value expression>

<SQL executable statement> ::=
     <SQL schema statement>
   | <SQL data statement>
   | <SQL transaction statement>
   | <SQL connection statement>
   | <SQL session 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>
   | <role definition>
   | <grant role statement>
   | <domain definition>
   | <null class definition>
   | <character set definition>
   | <collation definition>
   | <translation definition>
   | <assertion definition>
   | <trigger definition>
   | <routine>
   | <abstract data type definition>
   | <type template definition>

<schema definition> ::=
   CREATE SCHEMA <schema name clause>
     [ <schema character set specification> ]
     [ <schema path 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 path specification> ::=
   PATH <schema name list>

<schema element> ::=
     <table definition>
   | <view definition>
   | <domain definition>
   | <null class definition>
   | <character set definition>
   | <collation definition>
   | <translation definition>
   | <assertion definition>
   | <trigger definition>
   | <routine>
   | <abstract data type definition>
   | <type template definition>
   | <grant statement>
   | <role definition>
   | <grant role statement>

<table definition> ::=
   CREATE [ <table scope> ] <table type> <table name>
     [ <constant or updatable> ]
     { <table element list> | <subtable clause> }
     [ ON COMMIT <table commit action> ROWS ]

<table scope> ::=
   <global or local> TEMPORARY

<global or local> ::=
     GLOBAL
   | LOCAL

<constant or updatable> ::=
     CONSTANT
   | UPDATABLE

<table element list> ::=
   <left paren> <table element> [ { <comma> <table element> }... ] <right paren>

<table element> ::=
     <column definition>
   | <table constraint definition>
   | <like clause>

<column definition> ::=
   <column name>
   { <data type> | <domain name> }
   [ <default clause> ]
   [ <column constraint definition>... ]
   [ <collate clause> ]
   [ <null clause> ]

<default clause> ::=
     { DEFAULT | <assignment operator> } <default option>

<default option> ::=
     <literal>
   | <datetime value function>
   | USER
   | CURRENT_USER
   | SESSION_USER
   | SYSTEM_USER
   | NULL [ <left paren> <null state> <right paren> ]
   | <function invocation>

<column constraint definition> ::=
   [ <constraint name definition> ]
   <column constraint> [ <constraint attributes> ]

<constraint name definition> ::= CONSTRAINT <constraint name>

<column constraint> ::=
     NOT NULL
   | <unique specification>
   | <references specification>
   | <check constraint definition>

<unique specification> ::=
     UNIQUE
   | PRIMARY KEY

<references specification> ::=
   REFERENCES [ PENDANT ] <referenced table and columns>
     [ MATCH <match type> ]
     [ <referential triggered action> ]

<referenced table and columns> ::=
    <table name> [ <left paren> [ <reference column list> ] <right paren> ]

<reference column list> ::= <column name list>

<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 [ <left paren> <null state> <right paren> ]
   | SET DEFAULT
   | RESTRICT
   | NO ACTION

<delete rule> ::= ON DELETE <referential action>

<check constraint definition> ::=
   CHECK <left paren> <search condition> <right paren>

<constraint attributes> ::=
     <constraint check time> [ [ NOT ] DEFERRABLE ]
   | [ NOT ] DEFERRABLE [ <constraint check time> ]

<constraint check time> ::=
     INITIALLY DEFERRED
   | INITIALLY IMMEDIATE

<null clause> ::=
   NULL IS <null class name>

<null class name> ::= <schema qualified name>

<null clause> ::=
   NULL IS <null class name>

<table constraint definition> ::=
   [ <constraint name definition> ]
   <table constraint> [ <constraint attributes> ]

<table constraint> ::=
     <unique constraint definition>
   | <referential constraint definition>
   | <check constraint definition>

<unique constraint definition> ::=
                               even in SQL3)
     <unique specification> [ <left paren> <unique column list>
         <right paren> ]
   | UNIQUE ( VALUE )

<unique column list> ::= <column name list>

<referential constraint definition> ::=
   FOREIGN KEY [ <left paren> <referencing columns> <right paren> ]
     <references specification>

<referencing columns> ::=
   <reference column list>

<like clause> ::= LIKE <table name>

<subtable clause> ::=
   UNDER <supertable clause>
       [ { , <supertable clause> }... ]

<supertable clause> ::=
   <supertable name>
     [ WITH ( <member renaming element>
         [ { , <member renaming element> }... ] ) ]

<supertable name> ::= <table name>

<member renaming element> ::=
   <supertable member name> AS <subtable member name>

<supertable member name> ::=
     <column name>
   | <routine name>

<subtable member name> ::=
     <column name>
   | <routine name>

<table commit action> ::=
     PRESERVE
   | DELETE

<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

<domain definition> ::=
   CREATE DOMAIN <domain name>
       [ AS ] <data type>
     [ <default clause> ]
     [ <domain constraint>... ]
     [ <collate clause> ]
     [ <null clause> ]

<domain constraint> ::=
   [ <constraint name definition> ]
   <check constraint definition> [ <constraint attributes> ]

<null class definition> ::=
   CREATE NULL CLASS <null class name> [ AS ]
       ( <null state list> )

<null state list> ::=
   <null state> [ { <comma> <null state> }... ]

<character set definition> ::=
   CREATE CHARACTER SET <character set name>
       [ AS ]
     <character set source>
     <form-of-use specification>
     [ <collate clause> | <limited collation definition> ]

<character set source> ::=
     GET <existing character set name>
         [ <plus sign> <character set source> ]
   | <left paren> <character list> <right paren>

<character list> ::=
   <character specification> [ { <comma> <character specification> }... ]

<character specification> ::=
     <character string literal>
   | <ISO 10646 position>
   | <ISO 10646 character name>

<ISO 10646 position> ::=
   <val> [ <sep> <val> [ <sep> <val> [ <sep> <val> ] ] ]

<val> ::= <unsigned numeric literal>

<sep> ::= <ampersand>

<ISO 10646 character name> ::= !! <EMPHASIS>(See the Syntax Rules)

<form-of-use specification> ::= <identifier>

<limited collation definition> ::=
   COLLATION FROM <collation source>

<collation source> ::=
     <collating sequence definition>
   | <translation collation>
   | <collation dictionary specification>
   | <collation routine specification>

<collating sequence definition> ::=
     <external collation>
   | <schema collation name>
   | <internal collation source>
   | 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>

<internal collation source> ::= <left paren> <collation options> <right paren>

<collation options> ::=
   <collation option> [ { <comma> <collation option> }... ]

<collation option> ::=
     USING <left paren> <collating basis> <right paren>
   | SEQUENCE <left paren> <enumerated collating sequence> <right paren>
   | MODIFY <left paren> <collating modifiers> <right paren>
   | WHEN NOT FOUND
       { IGNORE | MAX | MIN }

<collating basis> ::=
   <collating foundation> [ { <plus sign> <collating foundation> }... ]

<collating foundation> ::=
   <collating sequence definition>
   <collating sequence definition> [ { <asterisk> <translation name> }... ]

<enumerated collating sequence> ::=
   <collating chars> [ { <comma> <collating chars> }... ]

<collating chars> ::=
     <character specification>
   | <character range>

<character range> ::=
   <character specification> <minus sign> <character specification>

<collating modifiers> ::=
     <collating modifier> [ { <comma> <collating modifier> }... ]

<collating modifier> ::=
   <collating chars>
     { <less than operator> | <greater than operator> | <equals operator> }
   <collating chars>

<translation collation> ::=
   TRANSLATION <translation name>
       [ THEN COLLATION <collation name> ]

<collation dictionary specification> ::=
   DICTIONARY <dictionary name> [ <plus sign> <dictionary name> ]

<dictionary name> ::=
   <quote> <implementation-defined dictionary name> <quote>

<implementation-defined dictionary name> ::= !! <EMPHASIS>(See the Syntax Rules)

<collation routine specification> ::=
     ROUTINE <left paren> <implementation-defined routine name>
         <left paren> <params> <right paren> <right paren>

<implementation-defined routine name> ::= !! <EMPHASIS>(See the Syntax Rules)

<params> ::= !! <EMPHASIS>(Not yet defined)

<params> ::= !! <EMPHASIS>(Not yet defined)

<existing character set name> ::=
     <standard character repertoire name>
   | <implementation-defined character repertoire name>
   | <schema character set name>

<schema character set name> ::= <character set 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 routine>

<translation specification> ::=
     <external translation>
   | IDENTITY
   | <schema translation name>
   | <internal translation source>

<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>

<internal translation source> ::=
   <left paren> <translation options> <right paren>

<translation options> ::=
   <translation option> [ { <comma> <translation option> }... ]

<translation option> ::=
     USING <left paren> <translation basis> <right paren>
   | MODIFY <left paren> <translation modifiers> <right paren>

<translation basis> ::=
   <translation definition> [ { <asterisk> <translation definition> }... ]

<translation modifiers> ::=
     <translation modifier> [ { <comma> <translation modifier> }... ]

<translation modifier> ::=
   <collating chars> <equals operator> <collating chars>

<translation routine> ::=
     ROUTINE <left paren> <implementation-defined routine name>
         <left paren> <params> <right paren> <right paren>

<assertion definition> ::=
   CREATE ASSERTION <constraint name>
     <assertion trigger>...
     <triggered assertion> [ <constraint attributes> ]

<assertion trigger> ::=
     <immediate assertion trigger>
   | <deferred assertion trigger>

<immediate assertion trigger> ::=
   AFTER { <assertion trigger statement>
     [ { <comma> <assertion trigger statement> }... ] ON
          <table name> }...

<assertion trigger statement> ::=
     INSERT
   | DELETE
   | UPDATE [ OF <left paren> <assertion column list> <right paren> ]

<assertion column list> ::= <column name list>

<deferred assertion trigger> ::= BEFORE COMMIT

<triggered assertion> ::=
   CHECK <left paren> <search condition> <right paren>
     [ FOR
         [ EACH [ ROW OF ] ] <table name> ]

<routine> ::=
   [ CREATE | DECLARE ] <routine header> <routine name> <parameter list>
   [ <returns clause> ]
   [ <caller language clause> ]
   [ SPECIFIC <specific name> ] <semicolon>
   <routine body> <semicolon>

<routine header> ::=
     PROCEDURE
   | [ <function type> ] FUNCTION

<function type> ::=
     CONSTRUCTOR
   | DESTRUCTOR
   | DESIGNATOR
   | ACTOR

<parameter list> ::=
   <left paren>
     [ <parameter declaration> [ {  <comma> <parameter declaration> }... ] ]
   <right paren>

<parameter declaration> ::=
     [ <parameter mode> ] [ <parameter name> ] <data type>
         [ <default clause> ]
   | <status parameter>

<parameter mode> ::=
     IN
   | OUT
   | INOUT

<status parameter> ::=
     SQLSTATE
   | SQLCODE

<returns clause> ::= RETURNS <returns data type> [ <result cast> ]

<returns data type> ::= <data type>

<result cast> ::= CAST FROM <data type>

<caller language clause> ::= <language clause>

<specific name> ::= <schema qualified name>

<routine body> ::=
     <SQL routine body>
   | <external body reference>

<SQL routine body> ::= <SQL procedure statement>

<external body reference> ::=
   EXTERNAL [ NAME <external routine name> ]
   <external routine language clause>
   [ <variant attribute> ]

<external routine name> ::= <identifier>

<external routine language clause> ::= <language clause>

<variant attribute> ::=
     VARIANT
   | NOT VARIANT

<abstract data type definition> ::=
     <distinct type definition>
   | <explicit abstract data type definition>

<distinct type definition> ::=
   CREATE DISTINCT TYPE <distinct type name>
     AS <data type>

<distinct type name> ::= <abstract data type name>

<explicit abstract data type definition> ::=
   CREATE TYPE <abstract data type name>
     <abstract data type body>

<abstract data type body> ::=
   [ <oid options> ]
   [ <subtype clause> ]
   [ [ <constant or updatable> ] [ <member list> ] ]

<oid options> ::=
     WITH OID [ [ NOT ] VISIBLE ]
   | WITHOUT OID

<subtype clause> ::=
   UNDER <supertype clause>
       [ { <comma> <supertype clause> }... ]

<supertype clause> ::=
   <abstract data type name> [ <component renaming clause> ]

<component renaming clause> ::=
   WITH <left paren> <component renaming element>
       [ { , <component renaming element> }... ] <right paren>

<component renaming element> ::=
   <supertype component name> AS <subtype component name>

<supertype component name> ::= <component name>

<component name> ::= <identifier>

<subtype component name> ::= <component name>

<member list> ::=
   <left paren> <member> [ { <comma> <member> }... ] <right paren>

<member> ::=
     <attribute definition>
   | <routine declaration>
   | <operator name list>
   | <equals clause>
   | <less-than clause>
   | <cast clause>
   | <table constraint definition>

<attribute definition> ::=
     <stored attribute>
   | <virtual attribute>

<stored attribute> ::=
   [ <encapsulation level> ]
   <attribute name> [ <constant or updatable> ]
   { <data type> | <domain name> }
   [ <default clause> ]
   [ <column constraint definition>... ]
   [ <collate clause> ]
   [ <null clause> ]

<encapsulation level> ::=
     PRIVATE
   | PROTECTED
   | PUBLIC

<virtual attribute> ::=
   [ <encapsulation level> ]
     <attribute name> <derivation clause>
   [ <check constraint definition>... ]
   [ <collate clause> ]

<derivation clause> ::=
   [ READ ONLY | CONSTANT | UPDATABLE ] <data type>
     VIRTUAL [ <derivation functions> ]

<derivation functions> ::=
     <get function> [ <set function> ]
   | <set function> [ <get function> ]

<get function> ::=
   GET WITH <routine name>

<set function> ::=
   SET WITH <routine name>

<routine declaration> ::=
   [ <encapsulation level> ] <routine>

<operator name list> ::=
   OPERATORS <specific routine designator>...

<specific routine designator> ::=
     SPECIFIC <specific name>
   | <member name>

<member name> ::= <routine name> [ <data type list> ]

<data type list> ::=
   <left paren> <data type> [ { <comma> <data type> }... ] <right paren>

<equals clause> ::=
   EQUALS <equals function specification> <semicolon>

<equals function specification> ::=
     <routine name>
   | STATE
   | OID

<less-than clause> ::=
   LESS THAN <less-than function specification> <semicolon>

<less-than function specification> ::=
     <routine name>
   | NONE

<cast clause> ::=
   CAST <left paren> <operand data type> AS
       <result data type>
        WITH <cast function> <right paren> <semicolon>

<operand data type> ::= <data type>

<result data type> ::= <data type>

<cast function> ::=
   <routine name>

<type template definition> ::=
   CREATE TYPE TEMPLATE <type template name>
     <template parameter declaration list>
     <abstract data type body>

<template parameter declaration list> ::=
   <left paren>
     <template parameter declaration>
       [ { <comma> <template parameter declaration>}... ]
   <right paren>

<template parameter declaration> ::=
   <template parameter name> <template parameter type>

<template parameter type> ::=
     <data type>
   | TYPE

<grant statement> ::=
   GRANT <privileges>
     TO <grantee> [ { <comma> <grantee> }... ]
       [ WITH GRANT OPTION ]

<privileges> ::=
     ALL SCHEMA PRIVILEGES
   | <object privileges> ON <object name>

<object privileges> ::=
     ALL PRIVILEGES
   | <action> [ { <comma> <action> }... ]

<action> ::=
     SELECT [ <left paren> <privilege column list> <right paren> ]
   | 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
   | TRIGGER
   | EXECUTE
   | UNDER

<privilege column list> ::= <column name list>

<object name> ::=
     [ <table type> ] <table name>
   | DOMAIN <domain name>
   | COLLATION <collation name>
   | CHARACTER SET <character set name>
   | TRANSLATION <translation name>
   | NULL CLASS <null class name>
   | DATA TYPE <abstract data type name>
   | MODULE <module name>
   | TYPE TEMPLATE <type template name>
   | EXTERNAL ROUTINE <specific routine designator>

<grantee> ::=
     PUBLIC
   | <authorization identifier>
   | <role name>

<role name> ::= <authorization identifier>

<role definition> ::= CREATE ROLE <role name>

<grant role statement> ::=
   GRANT <role granted> [ { <comma> <role granted> }... ]
     TO <grantee> [ { <comma> <grantee> }... ]
       [ WITH ADMIN OPTION ]

<role granted> ::= <role name>

<SQL schema manipulation statement> ::=
     <drop schema statement>
   | <alter table statement>
   | <drop table statement>
   | <drop view statement>
   | <revoke statement>
   | <revoke role statement>
   | <drop role statement>
   | <alter domain statement>
   | <drop domain statement>
   | <drop null class statement>
   | <drop character set statement>
   | <drop collation statement>
   | <drop translation statement>
   | <drop assertion statement>
   | <drop trigger statement>
   | <drop routine statement>
   | <drop data type statement>
   | <drop type template statement>

<drop schema statement> ::=
   DROP SCHEMA <schema name> <drop behavior>

<drop behavior> ::= CASCADE | RESTRICT

<alter table statement> ::=
   ALTER <table type> <table name> <alter table action>

<alter table action> ::=
     <add column definition>
   | <alter column definition>
   | <drop column definition>
   | <add supertable clause>
   | <drop supertable clause>
   | <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>
   | <drop column domain clause>

<set column default clause> ::=
   SET <default clause>

<drop column default clause> ::=
   DROP DEFAULT

<drop column domain clause> ::=
   DROP DOMAIN [ <constraint disposition> [ <constraint name list> ] ]

<constraint disposition> ::=
     KEEP COLUMN CONSTRAINT
   | DROP COLUMN CONSTRAINT

<constraint name list> ::=
     ALL
   | <constraint name> [ { <comma> <constraint name> }... ]

<drop column definition> ::=
   DROP [ COLUMN ] <column name> <drop behavior>

<add supertable clause> ::=
   ADD <supertable clause>

<drop supertable clause> ::=
   DROP <supertable clause> <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 type> <table name> <drop behavior>

<drop view statement> ::=
   DROP VIEW <table name> <drop behavior>

<revoke statement> ::=
   REVOKE [ GRANT OPTION FOR ]
       <privileges>
     FROM <grantee> [ { <comma> <grantee> }... ] <drop behavior>

<revoke role statement> ::=
   REVOKE <role revoked> [ { <comma> <role revoked> }... ]
     FROM <grantee> [ { <comma> <grantee> }... ]

<role revoked> ::= <role name>

<drop role statement> ::= DROP ROLE <role name>

<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>
     [ <constraint disposition> ]

<drop domain statement> ::=
   DROP DOMAIN <domain name> <drop behavior>
     [ <constraint disposition> [ <constraint name list> ] ]

<drop null class statement> ::=
    DROP NULL CLASS <null class name>

<drop character set statement> ::=
   DROP CHARACTER SET <character set name>

<drop collation statement> ::=
   DROP COLLATION <collation name>
     <drop behavior>

<drop translation statement> ::=
   DROP TRANSLATION <translation name>

<drop assertion statement> ::=
   DROP ASSERTION <constraint name>

<drop trigger statement> ::= DROP TRIGGER <trigger name>

<drop routine statement> ::=
   DROP { PROCEDURE | FUNCTION } <specific routine designator> <drop behavior>

<drop data type statement> ::=
   DROP DATA TYPE
       <abstract data type name> <drop behavior>

<drop type template statement> ::=
   DROP TYPE TEMPLATE <type template name>
     <drop behavior>

<SQL data statement> ::=
     <open statement>
   | <fetch statement>
   | <close statement>
   | <select statement: single row>
   | <new statement>
   | <destroy statement>
   | <SQL data change statement>

<open statement> ::=
   OPEN <cursor name>
     [ <open cascade option> ]

<open cascade option> ::=
     CASCADE ON
   | CASCADE OFF

<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> ::=
     <item reference>
   | <literal>

<fetch target list> ::=
   <target specification> [ { <comma> <target specification> }... ]

<target specification> ::=
     <item reference>
   | <template parameter name>

<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> }... ]

<new statement> ::=
   NEW <item reference>

<destroy statement> ::=
   DESTROY <object parameter name>

<object parameter name> ::= <parameter name>

<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 reference>
     [ WHERE <search condition> ]

<insert statement> ::=
   INSERT INTO { <table reference> | CURSOR <cursor name> }
     <insert columns and source>
     [ <insert point> ]

<insert columns and source> ::=
     [ <left paren> <insert column list> <right paren> ]
           <query expression>
   | DEFAULT VALUES

<insert column list> ::= <column name list>

<insert point> ::=
   <relative insert point> ELEMENT <where clause>

<relative insert point> ::=
     BEFORE
   | AFTER

<update statement: positioned> ::=
   UPDATE [ <table reference> ]
     SET [ <update type> ] <set clause list>
       WHERE CURRENT OF <cursor name>

<update type> ::= ALL | SOME | NONE

<set clause list> ::=
   <set clause> [ { <comma> <set clause> }... ]

<set clause> ::=
   <update target> <equals operator> <row value designator>

<update target> ::=
     <object column>
   | <left paren> <object column list> <right paren>

<object column> ::= <column name>

<object column list> ::=
   <object column> [ { <comma> <object column> }... ]

<update statement: searched> ::=
   UPDATE <table reference>
     <update mechanism>
     [ WHERE <search condition> ]

<update mechanism> ::=
     <update by setting>
   | <update by moving>

<update by setting> ::=
   SET [ <update type> ] <set clause list>

<update by moving> ::=
   MOVE <insert point>

<SQL transaction statement> ::=
     <start transaction statement>
   | <set transaction statement>
   | <set constraints mode statement>
   | <test completion statement>
   | <savepoint statement>
   | <release savepoint statement>
   | <commit statement>
   | <rollback statement>

<start transaction statement> ::=
   START 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 transaction statement> ::=
   SET [ LOCAL ] TRANSACTION <transaction mode>
       [ { <comma> <transaction mode> }... ]

<set constraints mode statement> ::=
   SET CONSTRAINTS <constraint name list>
       { DEFERRED | IMMEDIATE }

<test completion statement> ::=
   { TEST | WAIT }
      { ALL | ANY | <async statement identifier list> }
   COMPLETION

<async statement identifier list> ::=
   <left paren> <async statement identifier>
       [ { <comma> <async statement identifier> }... ] <right paren>

<savepoint statement> ::= SAVEPOINT <savepoint specifier>

<savepoint specifier> ::=
     <savepoint name>
   | <simple target specification>

<savepoint name> ::= <identifier>

<simple target specification> ::=
   <item reference>

<release savepoint statement> ::=
   RELEASE SAVEPOINT <savepoint specifier>

<commit statement> ::=
   COMMIT [ WORK ] [ AND [ NO ] CHAIN ]

<rollback statement> ::=
   ROLLBACK [ WORK ] [ AND[ NO ]  CHAIN ]
     [ <savepoint clause> ]

<savepoint clause> ::=
   TO SAVEPOINT <savepoint specifier>

<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 session authorization identifier statement>
   | <set role statement>
   | <set local time zone statement>

<set session authorization identifier statement> ::=
   SET SESSION AUTHORIZATION <value specification>

<set role statement> ::=
   SET ROLE { <role name> | NONE }

<set local time zone statement> ::=
   SET TIME ZONE
       <set time zone value>

<set time zone value> ::=
     <interval value expression>
   | LOCAL

<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
   | ROW_COUNT
   | TRANSACTIONS_COMMITTED
   | TRANSACTIONS_ROLLED_BACK
   | TRANSACTION_ACTIVE

<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
   | TRIGGER_CATALOG
   | TRIGGER_SCHEMA
   | TRIGGER_NAME
   | CATALOG_NAME
   | SCHEMA_NAME
   | TABLE_NAME
   | COLUMN_NAME
   | CURSOR_NAME
   | ROUTINE_CATALOG
   | ROUTINE_SCHEMA
   | ROUTINE_NAME
   | SPECIFIC_NAME
   | MESSAGE_TEXT
   | MESSAGE_LENGTH
   | MESSAGE_OCTET_LENGTH

<order by clause> ::=
   ORDER BY <sort specification list>

<updatability clause> ::=
   FOR
       { READ ONLY |
         UPDATE [ OF <column name list> ] }

<temporary abstract data type declaration> ::=
   DECLARE TEMPORARY TYPE <abstract data type name>
       <abstract data type body>

<temporary table declaration> ::=
   DECLARE LOCAL TEMPORARY <table type> <table name>
     <table element list>
     [ ON COMMIT <table commit action> ROWS ]

<temporary view declaration> ::=
   DECLARE TEMPORARY VIEW <table name>
       [ <left paren> <view column list> <right paren> ]
       AS <query expression>

<scalar subquery> ::= <subquery>

<regular expression> ::=
     <regular term>
   | <regular expression> <vertical bar> <regular term>

<regular term> ::=
     <regular factor>
   | <regular term> <regular factor>

<regular factor> ::=
     <regular primary>
   | <regular primary> <asterisk>
   | <regular primary> <plus sign>

<regular primary> ::=
     <character specifier>
   | <percent>
   | <regular character set>
   | <left paren> <regular expression> <right paren>

<character specifier> ::=
     <non-escaped character>
   | <escaped character>

<non-escaped character> ::= !! <EMPHASIS>(See the Syntax Rules)

<escaped character> ::= !! <EMPHASIS>(See the Syntax Rules)

<regular character set> ::=
     <underscore>
   | <left bracket> <character enumeration>... <right bracket>
   | <left bracket> <circumflex> <character enumeration>... <right bracket>
   | <left bracket> <colon> <regular character set identifier> <colon> <right bracket>

<character enumeration> ::=
     <character specifier>
   | <character specifier> <minus sign> <character specifier>

<regular character set identifier> ::= <identifier>

<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>




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