use base qw/DBIx::Class::Storage::DBI/;
-# __PACKAGE__->load_components(qw/PK::Auto/);
+use Scope::Guard ();
+use Context::Preserve 'preserve_context';
+use DBIx::Class::Carp;
+use Try::Tiny;
+use namespace::clean;
+__PACKAGE__->sql_limit_dialect ('LimitOffset');
+__PACKAGE__->sql_quote_char ('"');
+__PACKAGE__->datetime_parser_type ('DateTime::Format::Pg');
+__PACKAGE__->_use_multicolumn_in (1);
+
+sub _determine_supports_insert_returning {
+ return shift->_server_info->{normalized_dbms_version} >= 8.002
+ ? 1
+ : 0
+ ;
+}
+
+sub with_deferred_fk_checks {
+ my ($self, $sub) = @_;
+
+ my $txn_scope_guard = $self->txn_scope_guard;
+
+ $self->_do_query('SET CONSTRAINTS ALL DEFERRED');
+
+ return preserve_context {
+ my $inner_self = $self; # avoid nested closure leak on 5.8
+ my $sg = Scope::Guard->new(sub {
+ $inner_self->_do_query('SET CONSTRAINTS ALL IMMEDIATE');
+ });
+ $sub->()
+ } after => sub { $txn_scope_guard->commit };
+}
+
+# only used when INSERT ... RETURNING is disabled
sub last_insert_id {
- my ($self, $source) = @_;
- $self->get_autoinc_seq($source) unless $source->{_autoinc_seq};
- $self->_dbh->last_insert_id(undef,undef,undef,undef,
- {sequence => $source->{_autoinc_seq}});
+ my ($self,$source,@cols) = @_;
+
+ my @values;
+
+ my $col_info = $source->columns_info(\@cols);
+
+ for my $col (@cols) {
+ my $seq = ( $col_info->{$col}{sequence} ||= $self->dbh_do('_dbh_get_autoinc_seq', $source, $col) )
+ or $self->throw_exception( sprintf(
+ "Could not determine sequence for column '%s.%s', please consider adding a schema-qualified sequence to its column info",
+ $source->name,
+ $col,
+ ));
+
+ push @values, $self->_dbh->last_insert_id(undef, undef, undef, undef, {sequence => $seq});
+ }
+
+ return @values;
+}
+
+sub _sequence_fetch {
+ my ($self, $function, $sequence) = @_;
+
+ $self->throw_exception('No sequence to fetch') unless $sequence;
+
+ my ($val) = $self->_get_dbh->selectrow_array(
+ sprintf ("select %s('%s')", $function, (ref $sequence eq 'SCALAR') ? $$sequence : $sequence)
+ );
+
+ return $val;
+}
+
+sub _dbh_get_autoinc_seq {
+ my ($self, $dbh, $source, $col) = @_;
+
+ my $schema;
+ my $table = $source->name;
+
+ # deref table name if it needs it
+ $table = $$table
+ if ref $table eq 'SCALAR';
+
+ # parse out schema name if present
+ if( $table =~ /^(.+)\.(.+)$/ ) {
+ ( $schema, $table ) = ( $1, $2 );
+ }
+
+ # get the column default using a Postgres-specific pg_catalog query
+ my $seq_expr = $self->_dbh_get_column_default( $dbh, $schema, $table, $col );
+
+ # if no default value is set on the column, or if we can't parse the
+ # default value as a sequence, throw.
+ unless ( defined $seq_expr and $seq_expr =~ /^nextval\(+'([^']+)'::(?:text|regclass)\)/i ) {
+ $seq_expr = '' unless defined $seq_expr;
+ $schema = "$schema." if defined $schema && length $schema;
+ $self->throw_exception( sprintf (
+ "No sequence found for '%s%s.%s', check the RDBMS table definition or explicitly set the ".
+ "'sequence' for this column in %s",
+ $schema ? "$schema." : '',
+ $table,
+ $col,
+ $source->source_name,
+ ));
+ }
+
+ return $1; # exception thrown unless match is made above
+}
+
+# custom method for fetching column default, since column_info has a
+# bug with older versions of DBD::Pg
+sub _dbh_get_column_default {
+ my ( $self, $dbh, $schema, $table, $col ) = @_;
+
+ # Build and execute a query into the pg_catalog to find the Pg
+ # expression for the default value for this column in this table.
+ # If the table name is schema-qualified, query using that specific
+ # schema name.
+
+ # Otherwise, find the table in the standard Postgres way, using the
+ # search path. This is done with the pg_catalog.pg_table_is_visible
+ # function, which returns true if a given table is 'visible',
+ # meaning the first table of that name to be found in the search
+ # path.
+
+ # I *think* we can be assured that this query will always find the
+ # correct column according to standard Postgres semantics.
+ #
+ # -- rbuels
+
+ my $sqlmaker = $self->sql_maker;
+ local $sqlmaker->{bindtype} = 'normal';
+
+ my ($where, @bind) = $sqlmaker->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) = $dbh->selectrow_array(<<EOS,undef,@bind);
+
+SELECT
+ (SELECT pg_catalog.pg_get_expr(d.adbin, d.adrelid)
+ FROM pg_catalog.pg_attrdef d
+ WHERE d.adrelid = a.attrelid AND d.adnum = a.attnum AND a.atthasdef)
+FROM pg_catalog.pg_class c
+ LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
+ JOIN pg_catalog.pg_attribute a ON a.attrelid = c.oid
+$where
+
+EOS
+
+ return $seq_expr;
}
-sub get_autoinc_seq {
- my ($self,$source) = @_;
-
- # return the user-defined sequence if known
- my $result_class = $source->result_class;
- if ($result_class->can('sequence') and $result_class->sequence) {
- return ($source->{_autoinc_seq} = $result_class->sequence);
+
+sub sqlt_type {
+ return 'PostgreSQL';
+}
+
+sub bind_attribute_by_data_type {
+ my ($self,$data_type) = @_;
+
+ if ($self->_is_binary_lob_type($data_type)) {
+ # this is a hot-ish codepath, use an escape flag to minimize
+ # amount of function/method calls
+ # additionally version.pm is cock, and memleaks on multiple
+ # ->VERSION calls
+ # the flag is stored in the DBD namespace, so that Class::Unload
+ # will work (unlikely, but still)
+ unless ($DBD::Pg::__DBIC_DBD_VERSION_CHECK_DONE__) {
+ if ($self->_server_info->{normalized_dbms_version} >= 9.0) {
+ try { DBD::Pg->VERSION('2.17.2'); 1 } or carp (
+ __PACKAGE__.': BYTEA columns are known to not work on Pg >= 9.0 with DBD::Pg < 2.17.2'
+ );
+ }
+ elsif (not try { DBD::Pg->VERSION('2.9.2'); 1 } ) { carp (
+ __PACKAGE__.': DBD::Pg 2.9.2 or greater is strongly recommended for BYTEA column support'
+ )}
+
+ $DBD::Pg::__DBIC_DBD_VERSION_CHECK_DONE__ = 1;
+ }
+
+ return { pg_type => DBD::Pg::PG_BYTEA() };
}
-
- 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\('"?([^"']+)"?'::(?:text|regclass)\)/)
- {
- $source->{_autoinc_seq} = $1;
- last;
- }
+ else {
+ return undef;
}
}
+sub _exec_svp_begin {
+ my ($self, $name) = @_;
+
+ $self->_dbh->pg_savepoint($name);
+}
+
+sub _exec_svp_release {
+ my ($self, $name) = @_;
+
+ $self->_dbh->pg_release($name);
+}
+
+sub _exec_svp_rollback {
+ my ($self, $name) = @_;
+
+ $self->_dbh->pg_rollback_to($name);
+}
+
+sub deployment_statements {
+ my $self = shift;;
+ my ($schema, $type, $version, $dir, $sqltargs, @rest) = @_;
+
+ $sqltargs ||= {};
+
+ if (
+ ! exists $sqltargs->{producer_args}{postgres_version}
+ and
+ my $dver = $self->_server_info->{normalized_dbms_version}
+ ) {
+ $sqltargs->{producer_args}{postgres_version} = $dver;
+ }
+
+ $self->next::method($schema, $type, $version, $dir, $sqltargs, @rest);
+}
+
1;
-=head1 NAME
+__END__
+
+=head1 NAME
DBIx::Class::Storage::DBI::Pg - Automatic primary key class for PostgreSQL
=head1 SYNOPSIS
- # In your table classes
- __PACKAGE__->load_components(qw/PK::Auto Core/);
+ # In your result (table) classes
+ use base 'DBIx::Class::Core';
__PACKAGE__->set_primary_key('id');
- __PACKAGE__->sequence('mysequence');
=head1 DESCRIPTION
This class implements autoincrements for PostgreSQL.
-=head1 AUTHORS
+=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' ],
+ },
+ );
-Marcus Ramberg <m.ramberg@cpan.org>
+=head1 FURTHER QUESTIONS?
-=head1 LICENSE
+Check the list of L<additional DBIC resources|DBIx::Class/GETTING HELP/SUPPORT>.
-You may distribute this code under the same terms as Perl itself.
+=head1 COPYRIGHT AND LICENSE
-=cut
+This module is free software L<copyright|DBIx::Class/COPYRIGHT AND LICENSE>
+by the L<DBIx::Class (DBIC) authors|DBIx::Class/AUTHORS>. You can
+redistribute it and/or modify it under the same terms as the
+L<DBIx::Class library|DBIx::Class/COPYRIGHT AND LICENSE>.