NAME
SQL::Executor - Thin DBI wrapper using SQL::Maker
SYNOPSIS
use DBI;
use SQL::Executor;
my $dbh = DBI->connect($dsn, $id, $pass);
my $ex = SQL::Executor->new($dbh);
#
# SQL::Maker-like interfaces
my @rows = $ex->select('SOME_TABLE', { id => 123 });
$ex->insert('SOME_TABLE', { id => 124, value => 'xxxx'} );
$ex->update('SOME_TABLE', { value => 'yyyy'}, { id => 124 } );
$ex->delete('SOME_TABLE', { id => 124 } );
#
# select using SQL with named placeholder
my @rows= $ex->select_named('SELECT id, value1 FROM SOME_TABLE WHERE value2 = :arg1', { arg1 => 'aaa' });
DESCRIPTION
SQL::Executor is thin DBI wrapper using SQL::Maker. This module provides
interfaces to make easier access to SQL.
You can execute SQL via SQL::Maker-like interface in select(),
select_row(), select_all(), select_with_fields(),
select_row_with_fields(), select_all_with_fields(), insert(),
insert_multi(), update() and delete().
If you want to use more complex select query, you can use
select_named(), select_row_named() or select_all_named() these execute
SQL with named placeholder. If you don't want to use named placeholder,
you can use select_by_sql(), select_row_by_sql() or select_all_by_sql()
these execute SQL with normal placeholder('?').
* allow_empty_condition (BOOL default 1): allow empty condition(where)
in select/delete/update
* callback (coderef): specify callback coderef. callback is called for
each select* method
* check_empty_bind (BOOL default 0): if TRUE(1), select*_named() do
not accept unbound parameter, see named_bind() for detail.
These callbacks are useful for making row object.
my $ex = SQL::Executor->new($dbh, {
callback => sub {
my ($self, $row, $table_name, $select_id) = @_;
return CallBack::Class->new($row);
},
});
my $row = $ex->select_by_sql($sql1, \@binds1, 'TEST');
# $row isa 'CallBack::Class'
select($table_name, $where, $option)
select row(s). parameter is the same as select method in SQL::Maker. But
array ref for filed names are not needed. In array context, this method
behaves the same as select_all. In scalar context, this method behaves
the same as select_one
select_row($table_name, $where, $option)
select only one row. parameter is the same as select method in
SQL::Maker. But array ref for filed names are not needed. this method
returns hash ref and it is the same as return value in DBI's
selectrow_hashref/fetchrow_hashref.
select_all($table_name, $where, $option)
select all rows. parameter is the same as select method in SQL::Maker.
But array ref for filed names are not needed. this method returns array
that is composed of hash refs. (hash ref is same as DBI's
selectrow_hashref/fetchrow_hashref).
select_itr($table_name, $where, $option)
select and returns iterator. parameter is the same as select method in
SQL::Maker. But array ref for field names are not needed. Iterator is
SQL::Executor::Iterator object.
my $itr = select_itr('SOME_TABLE', { name => 'aaa' });
while( my $row = $itr->next ) {
# ... using row
}
select_named($sql, $params_href, $table_name)
select row(s). In array context, this method behaves the same as
select_all_with_fields. In scalar context, this method behaves the same
as select_one_with_fileds
You can use named placeholder in SQL like this,
my $ex = SQL::Executor->new($dbh);
my $row = $ex->select_named("SELECT * FROM SOME_TABLE WHERE id = :id", { id => 1234 });
$table_name is used for callback.
select_row_named($sql, $params_href, $table_name)
select only one row. You can use named placeholder in SQL like this,
my $ex = SQL::Executor->new($dbh);
my $row = $ex->select_row_named("SELECT * FROM SOME_TABLE WHERE id = :id", { id => 1234 });
this method returns hash ref and it is the same as return value in DBI's
selectrow_hashref/fetchrow_hashref.
$table_name is used for callback.
select_all_named($sql, $params_href, $table_name)
select all rows. You can use named placeholder in SQL like this,
my $ex = SQL::Executor->new($dbh);
my @rows = $ex->select_all_named("SELECT * FROM SOME_TABLE WHERE id = :id", { id => 1234 });
this method returns array that is composed of hash refs. (hash ref is
same as DBI's selectrow_hashref/fetchrow_hashref). $table_name is used
for callback.
select_itr_named($sql, $params_href, $table_name)
select and returns iterator. You can use named placeholder in SQL like
this,
my $ex = SQL::Executor->new($dbh);
my $itr = $ex->select_itr_named("SELECT * FROM SOME_TABLE WHERE id = :id", { id => 1234 });
$table_name is used for callback.
named_bind($sql, $params_href, $check_empty_bind)
returns sql which is executable in execute_query() and parameters for
bind.
my ($sql, @binds) = named_bind("SELECT * FROM SOME_TABLE WHERE id = :id", { id => 123 });
# $sql => "SELECT * FROM SOME_TABLE WHERE id = ?"
# @binds => (123)
parameter $check_empty_bind is optional. By default (or set
$check_empty_bind=0), named_bind() accepts unbound parameter like this,
my ($sql, @binds) = named_bind("SELECT * FROM SOME_TABLE WHERE id = :id", { });# do not bind :id
# $sql => "SELECT * FROM SOME_TABLE WHERE id = ?"
# @binds => (undef)
if $check_empty_bind is 1, named_bind() dies when unbound parameter is
specified.
select_by_sql($sql, \@binds, $table_name)
select row(s). In array context, this method behaves the same as
select_all_with_fields. In scalar context, this method behaves the same
as select_one_with_fileds
my $ex = SQL::Executor->new($dbh);
my $row = $ex->select_by_sql("SELECT * FROM SOME_TABLE WHERE id = ?", [1234]);
$table_name is only used for callback.
select_row_by_sql($sql, \@binds, $table_name)
select only one row.
my $ex = SQL::Executor->new($dbh);
my $row = $ex->select_row_by_sql("SELECT * FROM SOME_TABLE WHERE id = ?", [1234]);
this method returns hash ref and it is the same as return value in DBI's
selectrow_hashref/fetchrow_hashref.
select_all_by_sql($sql, \@binds, $table_name)
select all rows.
my $ex = SQL::Executor->new($dbh);
my @rows = $ex->select_all_by_sql("SELECT * FROM SOME_TABLE WHERE id = ?", [1234]);
this method returns array that is composed of hash refs. (hash ref is
same as DBI's selectrow_hashref/fetchrow_hashref).
select_itr_by_sql($sql, \@binds, $table_name)
select and returns iterator
my $ex = SQL::Executor->new($dbh);
my $itr = $ex->select_itr_by_sql("SELECT * FROM SOME_TABLE WHERE id = ?", [1234]);
Iterator is SQL::Executor::Iterator object.
select_with_fields($table_name, $fields_aref, $where, $option)
select row(s). parameter is the same as select method in SQL::Maker. In
array context, this method behaves the same as select_all_with_fields.
In scalar context, this method behaves the same as
select_one_with_fileds
select_row_with_fields($table_name, $fields_aref, $where, $option)
select only one row. parameter is the same as select method in
SQL::Maker. this method returns hash ref and it is the same as return
value in DBI's selectrow_hashref/fetchrow_hashref.
select_all_with_fields($table_name, $fields_aref, $where, $option)
select all rows. parameter is the same as select method in SQL::Maker.
But array ref for filed names are not needed. this method returns array
that is composed of hash refs. (hash ref is same as DBI's
selectrow_hashref/fetchrow_hashref).
select_itr_with_fields($table_name, $fields_aref, $where, $option)
select and return iterator object(SQL::Executor::Iterator). parameter is
the same as select method in SQL::Maker.
insert($table_name, $values)
Do INSERT statement. parameter is the same as select method in
SQL::Maker.
insert_multi($table_name, @args)
Do INSERT-multi statement using SQL::Maker::Plugin::InsertMulti.
delete($table_name, $where)
Do DELETE statement. parameter is the same as select method in
SQL::Maker.
update($table_name, $set, $where)
Do UPDATE statement. parameter is the same as select method in
SQL::Maker.
execute_query($sql, \@binds)
execute query and returns statement handler($sth).
execute_query_named($sql, $params_href)
execute query with named placeholder and returns statement
handler($sth).
disable_callback()
disable callback temporarily,
restore_callback()
restore disabled callback.
last_insert_id(@args)
If driver is mysql, return $dbh->{mysql_insertid}.If driver is SQLite,
return $dbh->sqlite_last_insert_rowid. If other driver is used, return
$dbh->last_insert_id(@args)
select_id()
generate id for select statament. but by default, id is not generated.
If you want to generate id, please override
How to use Transaction.
You can use DBI's transaction (begin_work and commit).
use DBI;
use SQL::Executor;
my $dbh = DBI->connect($dsn, $id, $pass);
my $ex = SQL::Executor->new($dbh);
$dbh->begin_work();
$ex->insert('SOME_TABLE', { id => 124, value => 'xxxx'} );
$ex->insert('SOME_TABLE', { id => 125, value => 'yyy'} );
$dbh->commit();
Or you can also use transaction management modules like
DBIx::TransactionManager.
use DBI;
use SQL::Executor;
use DBIx::TransactionManager;
my $dbh = DBI->connect($dsn, $id, $pass);
my $ex = SQL::Executor->new($dbh);
my $tm = DBIx::TransactionManager->new($dbh);
my $txn = $tm->txn_scope;
$ex->insert('SOME_TABLE', { id => 124, value => 'xxxx'} );
$ex->insert('SOME_TABLE', { id => 125, value => 'yyy'} );
$txn->commit;
FAQ
Why don't you use DBIx::Simple?
* I want to use SQL::Maker.
* When I need to use complex query, I want to use named placeholder.
* I don't want to manage transaction in this module.
AUTHOR
Takuya Tsuchida <tsucchi {at} cpan.org>
SEE ALSO
DBI, SQL::Maker, DBIx::Simple
Codes for named placeholder is taken from Teng's search_named.
LICENSE
Copyright (C) Takuya Tsuchida
This library is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
