Add set_ansi_mode on_connect_call for mysql

[dbsrgits/DBIx-Class.git] / lib / DBIx / Class / Storage / DBI / mysql.pm

diff --git a/lib/DBIx/Class/Storage/DBI/mysql.pm b/lib/DBIx/Class/Storage/DBI/mysql.pm
index 5c59d18..7c6e7ee 100644 (file)
--- a/lib/DBIx/Class/Storage/DBI/mysql.pm
+++ b/lib/DBIx/Class/Storage/DBI/mysql.pm
@@ -3,9 +3,23 @@ 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->_do_query('SET foreign_key_checks=0');
+  $sub->();
+  $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 {
   my ($self, $dbh, $source, $col) = @_;
@@ -33,14 +47,33 @@ sub _svp_rollback {
 
     $self->dbh->do("ROLLBACK TO SAVEPOINT $name")
 }
-
+ 
 sub is_replicating {
-    my $self = shift @_;
+    my $status = shift->dbh->selectrow_hashref('show slave status');
+    return ($status->{Slave_IO_Running} eq 'Yes') && ($status->{Slave_SQL_Running} eq 'Yes');
 }
 
 sub lag_behind_master {
-    my $self = shift @_;
-    return $self->dbh->selectrow_hashref('show slave status');
+    return shift->dbh->selectrow_hashref('show slave status')->{Seconds_Behind_Master};
+}
+
+# MySql can not do subquery update/deletes, only way is slow per-row operations.
+# This assumes you have set proper transaction isolation and use innodb.
+sub _subq_update_delete {
+  return shift->_per_row_update_delete (@_);
+}
+
+# MySql chokes on things like:
+# COUNT(*) FROM (SELECT tab1.col, tab2.col FROM tab1 JOIN tab2 ... )
+# claiming that col is a duplicate column (it loses the table specifiers by
+# the time it gets to the *). Thus for any subquery count we select only the
+# primary keys of the main table in the inner query. This hopefully still
+# hits the indexes and keeps mysql happy.
+# (mysql does not care if the SELECT and the GROUP BY match)
+sub _subq_count_select {
+  my ($self, $source, $rs_attrs) = @_;
+  my @pcols = map { join '.', $rs_attrs->{alias}, $_ } ($source->primary_columns);
+  return @pcols ? \@pcols : [ 1 ];
 }
 
 1;