# File lib/tapkit/access/sql.rb, line 442
                def prepare_update( row, qualifier )
                        @use_aliases = false

                        row.each do |key, value|
                                attr = @entity.attribute key
                                add_update_list(attr, value)
                        end

                        @where_clause = sql_for_qualifier qualifier
                        tables        = table_list @entity
                        @statement    = assemble_update(
                                row, qualifier, tables, @list_string, where_clause)
                        @use_aliases  = true
                end