fix comments

[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 19b035c..dcdeafe 100644 (file)
--- a/lib/DBIx/Class/Storage/DBI/mysql.pm
+++ b/lib/DBIx/Class/Storage/DBI/mysql.pm
@@ -3,10 +3,18 @@ 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/);
 
+sub with_deferred_fk_checks {
+  my ($self, $sub) = @_;
+
+  $self->dbh->do('SET foreign_key_checks=0');
+  $sub->();
+  $self->dbh->do('SET foreign_key_checks=1');
+}
+
 sub _dbh_last_insert_id {
   my ($self, $dbh, $source, $col) = @_;
   $dbh->{mysql_insertid};
@@ -17,21 +25,36 @@ sub sqlt_type {
 }
 
 sub _svp_begin {
-    my ($self, $dbh, $name) = @_;
+    my ($self, $name) = @_;
 
-    $dbh->do("SAVEPOINT $name");
+    $self->dbh->do("SAVEPOINT $name");
 }
 
 sub _svp_release {
-    my ($self, $dbh, $name) = @_;
+    my ($self, $name) = @_;
 
-    $dbh->do("RELEASE SAVEPOINT $name");
+    $self->dbh->do("RELEASE SAVEPOINT $name");
 }
 
 sub _svp_rollback {
-    my ($self, $dbh, $name) = @_;
+    my ($self, $name) = @_;
+
+    $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');
+}
+
+sub lag_behind_master {
+    return shift->dbh->selectrow_hashref('show slave status')->{Seconds_Behind_Master};
+}
 
-    $dbh->do("ROLLBACK TO SAVEPOINT $name")
+# 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;