+ return () unless $self->dbdef->table('part_virtual_field');
+
+ unless ( $virtual_fields_cache{$table} ) {
+ my $query = 'SELECT name from part_virtual_field ' .
+ "WHERE dbtable = '$table'";
+ my $dbh = dbh;
+ my $result = $dbh->selectcol_arrayref($query);
+ confess $dbh->errstr if $dbh->err;
+ $virtual_fields_cache{$table} = $result;
+ }
+
+ @{$virtual_fields_cache{$table}};