1 package DBIx::Class::Storage::DBI::Pg;
6 use base qw/DBIx::Class::Storage::DBI::MultiColumnIn/;
9 use DBD::Pg qw(:pg_types);
11 # Ask for a DBD::Pg with array support
12 warn "DBD::Pg 2.9.2 or greater is strongly recommended\n"
13 if ($DBD::Pg::VERSION < 2.009002); # pg uses (used?) version::qv()
15 sub with_deferred_fk_checks {
16 my ($self, $sub) = @_;
18 $self->_get_dbh->do('SET CONSTRAINTS ALL DEFERRED');
22 sub _dbh_last_insert_id {
23 my ($self, $dbh, $seq) = @_;
24 $dbh->last_insert_id(undef, undef, undef, undef, {sequence => $seq});
28 my ($self,$source,$col) = @_;
29 my $seq = ($source->column_info($col)->{sequence} ||= $self->get_autoinc_seq($source,$col));
30 $self->throw_exception("could not fetch primary key for " . $source->name . ", could not "
31 . "get autoinc sequence for $col (check that table and column specifications are correct "
32 . "and in the correct case)") unless defined $seq;
33 $self->dbh_do('_dbh_last_insert_id', $seq);
36 sub _get_pg_search_path {
38 # cache the search path as ['schema','schema',...] in the storage
40 $self->{_pg_search_path} ||= do {
42 my ($sp_string) = $dbh->selectrow_array('SHOW search_path');
43 while( $sp_string =~ s/("[^"]+"|[^,]+),?// ) {
44 unless( defined $1 and length $1 ) {
45 $self->throw_exception("search path sanity check failed: '$1'")
47 push @search_path, $1;
53 sub _dbh_get_autoinc_seq {
54 my ($self, $dbh, $schema, $table, @pri) = @_;
56 # get the list of postgres schemas to search. if we have a schema
57 # specified, use that. otherwise, use the search path
59 if( defined $schema and length $schema ) {
60 @search_path = ( $schema );
62 @search_path = @{ $self->_get_pg_search_path($dbh) };
65 foreach my $search_schema (@search_path) {
66 foreach my $col (@pri) {
67 my $info = $dbh->column_info(undef,$search_schema,$table,$col)->fetchrow_hashref;
69 # if we get here, we have definitely found the right
71 if( defined $info->{COLUMN_DEF} and
73 =~ /^nextval\(+'([^']+)'::(?:text|regclass)\)/i
76 return $seq =~ /\./ ? $seq : $info->{TABLE_SCHEM} . "." . $seq;
78 # we have found the column, but cannot figure out
89 my ($self,$source,$col) = @_;
91 my @pri = $source->primary_columns;
94 my $table = $source->name;
96 if (ref $table eq 'SCALAR') {
99 elsif ($table =~ /^(.+)\.(.+)$/) {
100 ($schema, $table) = ($1, $2);
103 $self->dbh_do('_dbh_get_autoinc_seq', $schema, $table, @pri);
110 sub datetime_parser_type { return "DateTime::Format::Pg"; }
112 sub bind_attribute_by_data_type {
113 my ($self,$data_type) = @_;
115 my $bind_attributes = {
116 bytea => { pg_type => DBD::Pg::PG_BYTEA },
117 blob => { pg_type => DBD::Pg::PG_BYTEA },
120 if( defined $bind_attributes->{$data_type} ) {
121 return $bind_attributes->{$data_type};
128 sub _sequence_fetch {
129 my ( $self, $type, $seq ) = @_;
130 my ($id) = $self->_get_dbh->selectrow_array("SELECT nextval('${seq}')");
135 my ($self, $name) = @_;
137 $self->_get_dbh->pg_savepoint($name);
141 my ($self, $name) = @_;
143 $self->_get_dbh->pg_release($name);
147 my ($self, $name) = @_;
149 $self->_get_dbh->pg_rollback_to($name);
156 DBIx::Class::Storage::DBI::Pg - Automatic primary key class for PostgreSQL
160 # In your table classes
161 __PACKAGE__->load_components(qw/PK::Auto Core/);
162 __PACKAGE__->set_primary_key('id');
163 __PACKAGE__->sequence('mysequence');
167 This class implements autoincrements for PostgreSQL.
171 Marcus Ramberg <m.ramberg@cpan.org>
175 You may distribute this code under the same terms as Perl itself.