insert_sql

# File activerecord/lib/active_record/connection_adapters/postgresql/database_statements.rb, line 54
        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 && use_insert_returning?
            select_value("#{sql} RETURNING #{quote_column_name(pk)}")
          elsif pk
            super
            last_insert_id_value(sequence_name || default_sequence_name(table_ref, pk))
          else
            super
          end
        end