use strict;
use warnings;
-use DBD::Pg;
+use base qw/DBIx::Class::Storage::DBI::MultiColumnIn/;
+use mro 'c3';
-use base qw/DBIx::Class::Storage::DBI/;
+use DBD::Pg qw(:pg_types);
-# __PACKAGE__->load_components(qw/PK::Auto/);
+# Ask for a DBD::Pg with array support
+warn "DBD::Pg 2.9.2 or greater is strongly recommended\n"
+ if ($DBD::Pg::VERSION < 2.009002); # pg uses (used?) version::qv()
-# Warn about problematic versions of DBD::Pg
-warn "DBD::Pg 1.49 is strongly recommended"
- if ($DBD::Pg::VERSION < 1.49);
+sub with_deferred_fk_checks {
+ my ($self, $sub) = @_;
-sub _dbh_last_insert_id {
- my ($self, $dbh, $seq) = @_;
- $dbh->last_insert_id(undef, undef, undef, undef, {sequence => $seq});
+ $self->_get_dbh->do('SET CONSTRAINTS ALL DEFERRED');
+ $sub->();
}
sub last_insert_id {
my ($self,$source,$col) = @_;
- my $seq = ($source->column_info($col)->{sequence} ||= $self->get_autoinc_seq($source,$col));
- $self->dbh_do($self->can('_dbh_last_insert_id'), $seq);
+ my $seq = ($source->column_info($col)->{sequence} ||= $self->get_autoinc_seq($source,$col))
+ or $self->throw_exception( "could not determine sequence for "
+ . $source->name
+ . ".$col, please consider adding a "
+ . "schema-qualified sequence to its column info"
+ );
+
+ $self->_dbh_last_insert_id ($self->_dbh, $seq);
+}
+
+# there seems to be absolutely no reason to have this as a separate method,
+# but leaving intact in case someone is already overriding it
+sub _dbh_last_insert_id {
+ my ($self, $dbh, $seq) = @_;
+ $dbh->last_insert_id(undef, undef, undef, undef, {sequence => $seq});
}
+
sub _dbh_get_autoinc_seq {
- my ($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} . "." . $seq;
- }
+ my ($self, $dbh, $schema, $table, $col) = @_;
+
+ my $sqlmaker = $self->sql_maker;
+ local $sqlmaker->{bindtype} = 'normal';
+
+ my ($where, @bind) = $self->sql_maker->where ({
+ 'a.attnum' => {'>', 0},
+ 'c.relname' => $table,
+ 'a.attname' => $col,
+ -not_bool => 'a.attisdropped',
+ (defined $schema && length $schema)
+ ? ( 'n.nspname' => $schema )
+ : ( -bool => \'pg_catalog.pg_table_is_visible(c.oid)' )
+ });
+
+ my ($seq_expr) = $dbh->selectrow_array(<<EOS,undef,@bind);
+
+SELECT
+ (SELECT pg_catalog.pg_get_expr(d.adbin, d.adrelid)
+ FROM pg_catalog.pg_attrdef d
+ WHERE d.adrelid = a.attrelid AND d.adnum = a.attnum AND a.atthasdef)
+FROM pg_catalog.pg_class c
+ JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
+ JOIN pg_catalog.pg_attribute a ON a.attrelid = c.oid
+$where
+
+EOS
+
+ unless (defined $seq_expr && $seq_expr =~ /^nextval\(+'([^']+)'::(?:text|regclass)\)/i ){
+ $seq_expr = '' unless defined $seq_expr;
+ $self->throw_exception("could not parse sequence expression: '$seq_expr'");
}
- return;
+
+ return $1;
}
sub get_autoinc_seq {
my ($self,$source,$col) = @_;
-
- my @pri = $source->primary_columns;
- my ($schema,$table) = $source->name =~ /^(.+)\.(.+)$/ ? ($1,$2)
- : (undef,$source->name);
- $self->dbh_do($self->can('_dbh_get_autoinc_seq'), $schema, $table, @pri);
+ my $schema;
+ my $table = $source->name;
+
+ if (ref $table eq 'SCALAR') {
+ $table = $$table;
+ }
+ elsif ($table =~ /^(.+)\.(.+)$/) {
+ ($schema, $table) = ($1, $2);
+ }
+
+ $self->dbh_do('_dbh_get_autoinc_seq', $schema, $table, $col);
}
sub sqlt_type {
sub datetime_parser_type { return "DateTime::Format::Pg"; }
+sub bind_attribute_by_data_type {
+ my ($self,$data_type) = @_;
+
+ my $bind_attributes = {
+ bytea => { pg_type => DBD::Pg::PG_BYTEA },
+ blob => { 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) = $self->_get_dbh->selectrow_array("SELECT nextval('${seq}')");
+ return $id;
+}
+
+sub _svp_begin {
+ my ($self, $name) = @_;
+
+ $self->_get_dbh->pg_savepoint($name);
+}
+
+sub _svp_release {
+ my ($self, $name) = @_;
+
+ $self->_get_dbh->pg_release($name);
+}
+
+sub _svp_rollback {
+ my ($self, $name) = @_;
+
+ $self->_get_dbh->pg_rollback_to($name);
+}
+
1;
+__END__
+
=head1 NAME
DBIx::Class::Storage::DBI::Pg - Automatic primary key class for PostgreSQL
This class implements autoincrements for PostgreSQL.
+=head1 POSTGRESQL SCHEMA SUPPORT
+
+This driver supports multiple PostgreSQL schemas, with one caveat: for
+performance reasons, data about the search path, sequence names, and
+so forth is queried as needed and CACHED for subsequent uses.
+
+For this reason, once your schema is instantiated, you should not
+change the PostgreSQL schema search path for that schema's database
+connection. If you do, Bad Things may happen.
+
+You should do any necessary manipulation of the search path BEFORE
+instantiating your schema object, or as part of the on_connect_do
+option to connect(), for example:
+
+ my $schema = My::Schema->connect
+ ( $dsn,$user,$pass,
+ { on_connect_do =>
+ [ 'SET search_path TO myschema, foo, public' ],
+ },
+ );
+
=head1 AUTHORS
-Marcus Ramberg <m.ramberg@cpan.org>
+See L<DBIx::Class/CONTRIBUTORS>
=head1 LICENSE
projects / dbsrgits/DBIx-Class.git / blobdiff