deferred class DB_EXPRESSION General cluster: interface Ancestors STRING_HDL Queries ht: HASH_TABLE [ANY, STRING_8] ht_order: ARRAYED_LIST [STRING_8] is_mapped (key: STRING_8): BOOLEAN last_query: STRING_8 mapped_value (key: STRING_8): ANY Commands clear_all execute_query set_map_name (n: ANY; key: STRING_8) set_query (query: STRING_8) unset_map_name (key: STRING_8)