X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FDBIx%2FClass%2FStorage%2FDBI%2Fmysql.pm;h=7c6e7eec6db966e0c742b06a0a62bff68c7728fb;hb=6a9992417a9b274d874519fd42f1b331d5ac91e6;hp=fa0419f36c642999a885d71e46ea5cde257a7406;hpb=e96a93dfeed5d4b22f146f2e2814d83973720b71;p=dbsrgits%2FDBIx-Class.git

diff --git a/lib/DBIx/Class/Storage/DBI/mysql.pm b/lib/DBIx/Class/Storage/DBI/mysql.pm
index fa0419f..7c6e7ee 100644
--- a/lib/DBIx/Class/Storage/DBI/mysql.pm
+++ b/lib/DBIx/Class/Storage/DBI/mysql.pm
@@ -3,16 +3,22 @@ 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/;
 
-# __PACKAGE__->load_components(qw/PK::Auto/);
+__PACKAGE__->sql_maker_class('DBIx::Class::SQLAHacks::MySQL');
 
 sub with_deferred_fk_checks {
   my ($self, $sub) = @_;
 
-  $self->dbh->do('SET foreign_key_checks=0');
+  $self->_do_query('SET foreign_key_checks=0');
   $sub->();
-  $self->dbh->do('SET foreign_key_checks=1');
+  $self->_do_query('SET foreign_key_checks=1');
+}
+
+sub connect_call_set_ansi_mode {
+  my $self = shift;
+  $self->_do_query(q|SET sql_mode = 'ANSI,TRADITIONAL'|);
+  $self->_do_query(q|SET SQL_AUTO_IS_NULL = 0|);
 }
 
 sub _dbh_last_insert_id {
@@ -51,6 +57,25 @@ 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 (@_);
+}
+
+# MySql chokes on things like:
+# COUNT(*) FROM (SELECT tab1.col, tab2.col FROM tab1 JOIN tab2 ... )
+# claiming that col is a duplicate column (it loses the table specifiers by
+# the time it gets to the *). Thus for any subquery count we select only the
+# primary keys of the main table in the inner query. This hopefully still
+# hits the indexes and keeps mysql happy.
+# (mysql does not care if the SELECT and the GROUP BY match)
+sub _subq_count_select {
+  my ($self, $source, $rs_attrs) = @_;
+  my @pcols = map { join '.', $rs_attrs->{alias}, $_ } ($source->primary_columns);
+  return @pcols ? \@pcols : [ 1 ];
+}
+
 1;
 
 =head1 NAME