gistfile1.rbx

#abstract/database_statements.rb
        # Returns the last auto-generated ID from the affected table.
        def insert_sql(sql, name = nil, pk = nil, id_value = nil, sequence_name = nil)
          execute(sql, name)
          id_value
        end

#mysql_adapter.rb

      def insert_sql(sql, name = nil, pk = nil, id_value = nil, sequence_name = nil) #:nodoc:
        super sql, name
        id_value || @connection.insert_id
      end

#mysql_adapter.rb, perhaps less GC

      def insert_sql(sql, name = nil, pk = nil, id_value = nil, sequence_name = nil) #:nodoc:
        @connection.query_with_result = false
        super sql, name
        id_value || @connection.insert_id
      end