added with_deferred_fk_checks functionality to storage

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

diff --git a/lib/DBIx/Class/Storage/DBI/Pg.pm b/lib/DBIx/Class/Storage/DBI/Pg.pm
index f9cbee9..937edfb 100644 (file)
--- a/lib/DBIx/Class/Storage/DBI/Pg.pm
+++ b/lib/DBIx/Class/Storage/DBI/Pg.pm
@@ -3,40 +3,110 @@ package DBIx::Class::Storage::DBI::Pg;
 use strict;
 use warnings;
 
+use DBD::Pg qw(:pg_types);
+
 use base qw/DBIx::Class::Storage::DBI/;
 
 # __PACKAGE__->load_components(qw/PK::Auto/);
 
+# Warn about problematic versions of DBD::Pg
+warn "DBD::Pg 1.49 is strongly recommended"
+  if ($DBD::Pg::VERSION < 1.49);
+
+sub with_deferred_fk_checks {
+  my ($self, $sub) = @_;
+
+  $self->dbh->do('SET CONSTRAINTS ALL DEFERRED');
+  $sub->();
+}
+
+sub _dbh_last_insert_id {
+  my ($self, $dbh, $seq) = @_;
+  $dbh->last_insert_id(undef, undef, undef, undef, {sequence => $seq});
+}
+
 sub last_insert_id {
   my ($self,$source,$col) = @_;
   my $seq = ($source->column_info($col)->{sequence} ||= $self->get_autoinc_seq($source,$col));
-  $self->_dbh->last_insert_id(undef,undef,undef,undef, {sequence => $seq});
+  $self->throw_exception("could not fetch primary key for " . $source->name . ", could not "
+    . "get autoinc sequence for $col (check that table and column specifications are correct "
+    . "and in the correct case)") unless defined $seq;
+  $self->dbh_do('_dbh_last_insert_id', $seq);
+}
+
+sub _dbh_get_autoinc_seq {
+  my ($self, $dbh, $schema, $table, @pri) = @_;
+
+  while (my $col = shift @pri) {
+    my $info = $dbh->column_info(undef,$schema,$table,$col)->fetchrow_hashref;
+    if(defined $info->{COLUMN_DEF} and
+       $info->{COLUMN_DEF} =~ /^nextval\(+'([^']+)'::(?:text|regclass)\)/) {
+      my $seq = $1;
+      # may need to strip quotes -- see if this works
+      return $seq =~ /\./ ? $seq : $info->{TABLE_SCHEM} . "." . $seq;
+    }
+  }
+  return;
 }
 
 sub get_autoinc_seq {
   my ($self,$source,$col) = @_;
     
   my @pri = $source->primary_columns;
-  my $dbh = $self->_dbh;
   my ($schema,$table) = $source->name =~ /^(.+)\.(.+)$/ ? ($1,$2)
     : (undef,$source->name);
-  while (my $col = shift @pri) {
-    my $info = $dbh->column_info(undef,$schema,$table,$col)->fetchrow_arrayref;
-    if (defined $info->[12] and $info->[12] =~ 
-      /^nextval\('([^']+)'::(?:text|regclass)\)/)
-    {
-      return $1; # may need to strip quotes -- see if this works
-    } 
-  }
+
+  $self->dbh_do('_dbh_get_autoinc_seq', $schema, $table, @pri);
 }
 
 sub sqlt_type {
   return 'PostgreSQL';
 }
 
+sub datetime_parser_type { return "DateTime::Format::Pg"; }
+
+sub bind_attribute_by_data_type {
+  my ($self,$data_type) = @_;
+
+  my $bind_attributes = {
+    bytea => { pg_type => DBD::Pg::PG_BYTEA },
+  };
+ 
+  if( defined $bind_attributes->{$data_type} ) {
+    return $bind_attributes->{$data_type};
+  }
+  else {
+    return;
+  }
+}
+
+sub _sequence_fetch {
+  my ( $self, $type, $seq ) = @_;
+  my ($id) = $self->dbh->selectrow_array("SELECT nextval('${seq}')");
+  return $id;
+}
+
+sub _svp_begin {
+    my ($self, $name) = @_;
+
+    $self->dbh->pg_savepoint($name);
+}
+
+sub _svp_release {
+    my ($self, $name) = @_;
+
+    $self->dbh->pg_release($name);
+}
+
+sub _svp_rollback {
+    my ($self, $name) = @_;
+
+    $self->dbh->pg_rollback_to($name);
+}
+
 1;
 
-=head1 NAME 
+=head1 NAME
 
 DBIx::Class::Storage::DBI::Pg - Automatic primary key class for PostgreSQL