SQL::Executor - Thin DBI wrapper using SQL::Maker
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' });
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('?').
$dbh: Database Handler $option_href: option
available option is as follows
- 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'
$dsn: DSN $user: database user $pass: database password $option_href_for_dbi: options passed to DBI $option_href: option for SQL::Executor (options are same as new() method)
connect database and create SQL::Executor instance. using this method, SQL::Executor uses managed connection and transaction via DBIx::Handler
return database handler
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 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 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 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 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 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 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 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 });
$table_name is used for callback.
returns sql which is executable in execute_query() and parameters for bind.
my ($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 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 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 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 and returns iterator
my $ex = SQL::Executor->new($dbh);
my $itr = $ex->select_itr_by_sql("SELECT * FROM SOME_TABLE WHERE id = ?", [1234]);
Iterator is SQL::Executor::Iterator object.
select row(s). parameter is the same as select method in SQL::Maker. In array context, this method behaves the same as select_all_with_fields. In scalar context, this method behaves the same as select_one_with_fileds
select only one row. parameter is the same as select method in SQL::Maker. this method returns hash ref and it is the same as return value in DBI's selectrow_hashref/fetchrow_hashref.
select all rows. parameter is the same as select method in SQL::Maker. But array ref for filed names are not needed. this method returns array that is composed of hash refs. (hash ref is same as DBI's selectrow_hashref/fetchrow_hashref).
select and return iterator object(SQL::Executor::Iterator). parameter is the same as select method in SQL::Maker.
Do INSERT statement. parameter is the same as select method in SQL::Maker.
Do INSERT-multi statement using SQL::Maker::Plugin::InsertMulti.
Do "INSERT ... ON DUPLICATE KEY UPDATE" query (works only MySQL) using SQL::Maker::Plugin::InsertOnDuplicate.
this method is available when SQL::Maker >= 1.09 is installed. If older version is installed, you will got error like "Can't locate SQL/Maker/Plugin/InsertOnDuplicate.pm in @INC ..."
Do DELETE statement. parameter is the same as select method in SQL::Maker.
Do UPDATE statement. parameter is the same as select method in SQL::Maker.
execute query and returns statement handler($sth).
execute query with named placeholder and returns statement handler($sth).
disable callback temporarily,
restore disabled callback.
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)
show error message. you can override this method in subclass to provide customized error message.
default error message is like this,
Error $error_message sql: $sql, binds: [$binds_aref]\n
generate id for select statament. but by default, id is not generated. If you want to generate id, please override
When create instance using connect() method, you can use DBIx::Handler's transaction management,
use SQL::Executor;
my $ex = SQL::Executor->connect($dsn, $id, $pass);
my $txn = $ex->handler->txn_scope();
$ex->insert('SOME_TABLE', { id => 124, value => 'xxxx'} );
$ex->insert('SOME_TABLE', { id => 125, value => 'yyy'} );
$txn->commit();
Or 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;
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.
Takuya Tsuchida <tsucchi {at} cpan.org>
Codes for named placeholder is taken from Teng's search_named.
Copyright (C) Takuya Tsuchida
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.