use strict;
use warnings;
+use base qw/DBIx::Class::Storage::DBI::MultiColumnIn/;
+use mro 'c3';
+
use DBD::Pg qw(:pg_types);
-use base qw/DBIx::Class::Storage::DBI/;
+# Ask for a DBD::Pg with array support
+warn "DBD::Pg 2.9.2 or greater is strongly recommended\n"
+ if ($DBD::Pg::VERSION < 2.009002); # pg uses (used?) version::qv()
+
+sub with_deferred_fk_checks {
+ my ($self, $sub) = @_;
-# __PACKAGE__->load_components(qw/PK::Auto/);
+ $self->_get_dbh->do('SET CONSTRAINTS ALL DEFERRED');
+ $sub->();
+}
-# Warn about problematic versions of DBD::Pg
-warn "DBD::Pg 1.49 is strongly recommended"
- if ($DBD::Pg::VERSION < 1.49);
+sub last_insert_id {
+ my ($self,$source,$col) = @_;
+ 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 => $seq});
}
-sub last_insert_id {
- my ($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'), $seq);
+
+sub _get_pg_search_path {
+ my ($self,$dbh) = @_;
+ # cache the search path as ['schema','schema',...] in the storage
+ # obj
+ $self->{_pg_search_path} ||= do {
+ my @search_path;
+ my ($sp_string) = $dbh->selectrow_array('SHOW search_path');
+ while( $sp_string =~ s/("[^"]+"|[^,]+),?// ) {
+ unless( defined $1 and length $1 ) {
+ $self->throw_exception("search path sanity check failed: '$1'")
+ }
+ push @search_path, $1;
+ }
+ \@search_path
+ };
}
sub _dbh_get_autoinc_seq {
- my ($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) = @_;
+
+ # get the list of postgres schemas to search. if we have a schema
+ # specified, use that. otherwise, use the search path
+ my @search_path;
+ if( defined $schema and length $schema ) {
+ @search_path = ( $schema );
+ } else {
+ @search_path = @{ $self->_get_pg_search_path($dbh) };
+ }
+
+ # find the sequence(s) of the column in question (should have nextval declared on it)
+ my @sequence_names;
+ foreach my $search_schema (@search_path) {
+ my $info = $dbh->column_info(undef,$search_schema,$table,$col)->fetchrow_hashref;
+ if($info && defined $info->{COLUMN_DEF}
+ && $info->{COLUMN_DEF} =~ /^nextval\(+'([^']+)'::(?:text|regclass)\)/i
+ ) {
+ push @sequence_names, $1;
+ }
+ }
+
+ if (@sequence_names != 1) {
+ $self->throw_exception (sprintf
+ q|Unable to reliably determine autoinc sequence name for '%s'.'%s' (possible candidates: %s)|,
+ $table,
+ $col,
+ join (', ', (@sequence_names ? @sequence_names : 'none found') ),
+ );
+ }
+
+ my $seq = $sequence_names[0];
+
+ if( $seq !~ /\./ ) {
+ my $sth = $dbh->prepare (
+ 'SELECT * FROM "information_schema"."sequences" WHERE "sequence_name" = ?'
+ );
+ $sth->execute ($seq);
+
+ my @seen_in_schemas;
+ while (my $h = $sth->fetchrow_hashref) {
+ push @seen_in_schemas, $h->{sequence_schema};
+ }
+
+ if (not @seen_in_schemas) {
+ $self->throw_exception (sprintf
+ q|Automatically determined autoinc sequence name '%s' for '%s'.'%s' does not seem to exist...'|,
+ $seq,
+ $table,
+ $col,
+ );
+ }
+ elsif (@seen_in_schemas > 1) {
+ $self->throw_exception (sprintf
+ q|Unable to reliably fully-qualify automatically determined autoinc sequence name '%s' for '%s'.'%s' (same name exist in schemas: %s)|,
+ $seq,
+ $table,
+ $col,
+ join (', ', (@seen_in_schemas)),
+ );
+ }
+ else {
+ my $sql_maker = $self->sql_maker;
+ $seq = join ('.', map { $sql_maker->_quote ($_) } ($seen_in_schemas[0], $seq) );
}
}
- return;
+
+ return $seq;
}
sub get_autoinc_seq {
my ($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, $col);
}
sub sqlt_type {
my ($self,$data_type) = @_;
my $bind_attributes = {
- bytea => { pg_type => DBD::Pg::PG_BYTEA },
+ 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};
}
}
}
+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 supports multiple PostgreSQL schemas, with one caveat: for
+performance reasons, the schema search path is queried the first time it is
+needed and CACHED for subsequent uses.
+
+For this reason, you should do any necessary manipulation of the
+PostgreSQL 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-Historic.git / blobdiff