Viatcheslav Kalinin <vka@xxxxxxxx> writes: > Now we change SECURITY INVOKER clause to SECURITY DEFINER and voila: >>> select * from array_to_set(array[1,2,3]); > ERROR: could not determine actual argument type for polymorphic > function "array_to_set" Wow, apparently you're the first person ever to try that, because it's never worked in any release since polymorphism was introduced :-(. Thanks for the report! The fix is pretty easy if you need it now: Index: fmgr.c =================================================================== RCS file: /cvsroot/pgsql/src/backend/utils/fmgr/fmgr.c,v retrieving revision 1.102 diff -c -r1.102 fmgr.c *** fmgr.c 4 Oct 2006 00:30:01 -0000 1.102 --- fmgr.c 31 Jul 2007 15:39:29 -0000 *************** *** 793,798 **** --- 793,799 ---- fmgr_info_cxt_security(fcinfo->flinfo->fn_oid, &fcache->flinfo, fcinfo->flinfo->fn_mcxt, true); + fcache->flinfo.fn_expr = fcinfo->flinfo->fn_expr; tuple = SearchSysCache(PROCOID, ObjectIdGetDatum(fcinfo->flinfo->fn_oid), regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 9: In versions below 8.0, the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match