$sub->();
}
+sub last_insert_id {
+ my ($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->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', $seq);
-}
+# get the postgres search path, and cache it
sub _get_pg_search_path {
my ($self,$dbh) = @_;
# cache the search path as ['schema','schema',...] in the storage
}
sub _dbh_get_autoinc_seq {
- my ($self, $dbh, $schema, $table, @pri) = @_;
-
- # 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) };
+ 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'");
}
- foreach my $search_schema (@search_path) {
- foreach my $col (@pri) {
- my $info = $dbh->column_info(undef,$search_schema,$table,$col)->fetchrow_hashref;
- if($info) {
- # if we get here, we have definitely found the right
- # column.
- if( defined $info->{COLUMN_DEF} and
- $info->{COLUMN_DEF}
- =~ /^nextval\(+'([^']+)'::(?:text|regclass)\)/i
- ) {
- my $seq = $1;
- return $seq =~ /\./ ? $seq : $info->{TABLE_SCHEM} . "." . $seq;
- } else {
- # we have found the column, but cannot figure out
- # the nextval seq
- return;
- }
- }
- }
- }
- return;
+ return $1;
}
sub get_autoinc_seq {
my ($self,$source,$col) = @_;
- my @pri = $source->primary_columns;
-
my $schema;
my $table = $source->name;
($schema, $table) = ($1, $2);
}
- $self->dbh_do('_dbh_get_autoinc_seq', $schema, $table, @pri);
+ $self->dbh_do('_dbh_get_autoinc_seq', $schema, $table, $col);
}
sub sqlt_type {
1;
+__END__
+
=head1 NAME
DBIx::Class::Storage::DBI::Pg - Automatic primary key class 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.
+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.
-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:
+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,
projects / dbsrgits/DBIx-Class.git / blobdiff