insert_sql

# File activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb, line 581
      def insert_sql(sql, name = nil, pk = nil, id_value = nil, sequence_name = nil)
        unless pk
          # Extract the table from the insert sql. Yuck.
          table_ref = extract_table_ref_from_insert_sql(sql)
          pk = primary_key(table_ref) if table_ref
        end

        if pk
          select_value("#{sql} RETURNING #{quote_column_name(pk)}")
        else
          super
        end
      end