Hannu Krosing <[EMAIL PROTECTED]> writes: > Joe Conway kirjutas E, 10.03.2003 kell 05:35: >> CREATE OR REPLACE FUNCTION array_push (anyarray, anyscalar) >> RETURNS anyarray
> could you make it > RETURNS typeof($1) Not directly --- we have to fit the return-type info into an OID field. We could fake it by inventing one or more pseudotypes, "SAMEASPARAMn". But I think I like better the notion of extending my bound-together- ANYARRAY-and-ANYELEMENT proposal, http://archives.postgresql.org/pgsql-hackers/2003-03/msg00319.php Suppose that we do that, and then further say that ANYARRAY or ANYELEMENT appearing as the return type implies that the return type is actually the common element or array type. Then we have such useful behaviors as: array_push(anyarray, anyelement) returns anyarray array_pop(anyarray) returns anyelement array_subscript(anyarray, int) yields anyelement singleton_array(anyelement) yields anyarray The last three cases cannot be handled by a SAMEASPARAM construct. regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 1: subscribe and unsubscribe commands go to [EMAIL PROTECTED]
