X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FDBIx%2FClass%2FStorage%2FDBI%2Fmysql.pm;h=bce1a077d749f8e9ef2f1b817fb2ad2ee6d85760;hb=daf4e3bed37d35feb43338142935dcb4c61313b8;hp=dadcbf05a017e90b954df6dff60e438a5d515302;hpb=f797e89e547c902c2a5cb1669f75c2bdb7769af7;p=dbsrgits%2FDBIx-Class.git

diff --git a/lib/DBIx/Class/Storage/DBI/mysql.pm b/lib/DBIx/Class/Storage/DBI/mysql.pm
index dadcbf0..bce1a07 100644
--- a/lib/DBIx/Class/Storage/DBI/mysql.pm
+++ b/lib/DBIx/Class/Storage/DBI/mysql.pm
@@ -3,9 +3,30 @@ package DBIx::Class::Storage::DBI::mysql;
 use strict;
 use warnings;
 
-use base qw/DBIx::Class::Storage::DBI/;
+use base qw/
+  DBIx::Class::Storage::DBI::MultiColumnIn
+  DBIx::Class::Storage::DBI::AmbiguousGlob
+  DBIx::Class::Storage::DBI
+/;
+use mro 'c3';
 
-# __PACKAGE__->load_components(qw/PK::Auto/);
+__PACKAGE__->sql_maker_class('DBIx::Class::SQLAHacks::MySQL');
+
+sub with_deferred_fk_checks {
+  my ($self, $sub) = @_;
+
+  $self->_do_query('SET FOREIGN_KEY_CHECKS = 0');
+  $sub->();
+  $self->_do_query('SET FOREIGN_KEY_CHECKS = 1');
+}
+
+sub connect_call_set_strict_mode {
+  my $self = shift;
+
+  # the @@sql_mode puts back what was previously set on the session handle
+  $self->_do_query(q|SET SQL_MODE = CONCAT('ANSI,TRADITIONAL,ONLY_FULL_GROUP_BY,', @@sql_mode)|);
+  $self->_do_query(q|SET SQL_AUTO_IS_NULL = 0|);
+}
 
 sub _dbh_last_insert_id {
   my ($self, $dbh, $source, $col) = @_;
@@ -33,7 +54,7 @@ sub _svp_rollback {
 
     $self->dbh->do("ROLLBACK TO SAVEPOINT $name")
 }
- 
+
 sub is_replicating {
     my $status = shift->dbh->selectrow_hashref('show slave status');
     return ($status->{Slave_IO_Running} eq 'Yes') && ($status->{Slave_SQL_Running} eq 'Yes');
@@ -43,25 +64,36 @@ sub lag_behind_master {
     return shift->dbh->selectrow_hashref('show slave status')->{Seconds_Behind_Master};
 }
 
+# MySql can not do subquery update/deletes, only way is slow per-row operations.
+# This assumes you have set proper transaction isolation and use innodb.
+sub _subq_update_delete {
+  return shift->_per_row_update_delete (@_);
+}
+
 1;
 
 =head1 NAME
 
-DBIx::Class::Storage::DBI::mysql - Automatic primary key class for MySQL
+DBIx::Class::Storage::DBI::mysql - Storage::DBI class implementing MySQL specifics
 
 =head1 SYNOPSIS
 
-  # In your table classes
-  __PACKAGE__->load_components(qw/PK::Auto Core/);
-  __PACKAGE__->set_primary_key('id');
+Storage::DBI autodetects the underlying MySQL database, and re-blesses the
+C<$storage> object into this class.
+
+  my $schema = MyDb::Schema->connect( $dsn, $user, $pass, { set_strict_mode => 1 } );
 
 =head1 DESCRIPTION
 
-This class implements autoincrements for MySQL.
+This class implements MySQL specific bits of L<DBIx::Class::Storage::DBI>.
+
+It also provides a one-stop on-connect macro C<set_strict_mode> which sets
+session variables such that MySQL behaves more predictably as far as the
+SQL standard is concerned.
 
 =head1 AUTHORS
 
-Matt S. Trout <mst@shadowcatsystems.co.uk>
+See L<DBIx::Class/CONTRIBUTORS>
 
 =head1 LICENSE