val init : ?flags:(flag list) -> ?log:(string -> unit) -> unit -> handle
val close : handle -> unit
val connected : handle -> bool
+val exec : handle ->
+ MQITypes.table -> MQITypes.columns ->
+ string MQITypes.con_true -> string MQITypes.con_false ->
+ MQITypes.result * MQITypes.query
val init_if_connected : ?flags:(flag list) -> ?log:(string -> unit) -> unit -> handle
val log : handle -> string -> unit
val set : handle -> flag -> bool
-val pgc : handle -> MQIDataBase.connection option
val flags : handle -> flag list
val tables : handle -> MathQL.path -> MQIMap.pg_tables
val field : handle -> MathQL.path -> string -> string