01-26-2009
Another Look at MySQL 5.1’s SQL Diagnostic Tools
Prior to MySQL 5.1, it wasn't all that easy to find the worst running SQL on a MySQL instance. And truth be told, MySQL still has a ways to go before it's an effortless process. But, the good news is there are some new aids in MySQL 5.1 and MySQL Enterprise that do make it more efficient to find and troubleshoot bad SQL code that's hiding inside a MySQL instance. Let's take a quick tour through these new features and see what help they provide.
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LEARN ABOUT MOJAVE
dbix::class::storage::dbi::mysql5.18
DBIx::Class::Storage::DBI::mysql(3) User Contributed Perl Documentation DBIx::Class::Storage::DBI::mysql(3)
NAME
DBIx::Class::Storage::DBI::mysql - Storage::DBI class implementing MySQL specifics
SYNOPSIS
Storage::DBI autodetects the underlying MySQL database, and re-blesses the $storage object into this class.
my $schema = MyApp::Schema->connect( $dsn, $user, $pass, { on_connect_call => 'set_strict_mode' } );
DESCRIPTION
This class implements MySQL specific bits of DBIx::Class::Storage::DBI, like AutoIncrement column support and savepoints. Also it augments
the SQL maker to support the MySQL-specific "STRAIGHT_JOIN" join type, which you can use by specifying "join_type => 'straight'" in the
relationship attributes
It also provides a one-stop on-connect macro "set_strict_mode" which sets session variables such that MySQL behaves more predictably as far
as the SQL standard is concerned.
STORAGE OPTIONS
set_strict_mode
Enables session-wide strict options upon connecting. Equivalent to:
->connect ( ... , {
on_connect_do => [
q|SET SQL_MODE = CONCAT('ANSI,TRADITIONAL,ONLY_FULL_GROUP_BY,', @@sql_mode)|,
q|SET SQL_AUTO_IS_NULL = 0|,
]
});
AUTHORS
See "CONTRIBUTORS" in DBIx::Class
LICENSE
You may distribute this code under the same terms as Perl itself.
perl v5.18.2 2014-01-22 DBIx::Class::Storage::DBI::mysql(3)