*
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/parser/parse_oper.c,v 1.75 2003/09/25 06:58:01 petere Exp $
+ * $Header: /cvsroot/pgsql/src/backend/parser/parse_oper.c,v 1.76 2003/10/06 20:09:47 tgl Exp $
*
*-------------------------------------------------------------------------
*/
* Check for an "exact" match to the specified operand types.
*
* If one operand is an unknown literal, assume it should be taken to be
- * the same type as the other operand for this purpose.
+ * the same type as the other operand for this purpose. Also, consider
+ * the possibility that the other operand is a domain type that needs to
+ * be reduced to its base type to find an "exact" match.
*/
static Oid
binary_oper_exact(Oid arg1, Oid arg2,
FuncCandidateList candidates)
{
+ FuncCandidateList cand;
+ bool was_unknown = false;
+
/* Unspecified type for one of the arguments? then use the other */
if ((arg1 == UNKNOWNOID) && (arg2 != InvalidOid))
+ {
arg1 = arg2;
+ was_unknown = true;
+ }
else if ((arg2 == UNKNOWNOID) && (arg1 != InvalidOid))
+ {
arg2 = arg1;
+ was_unknown = true;
+ }
- while (candidates != NULL)
+ for (cand = candidates; cand != NULL; cand = cand->next)
{
- if (arg1 == candidates->args[0] &&
- arg2 == candidates->args[1])
- return candidates->oid;
- candidates = candidates->next;
+ if (arg1 == cand->args[0] && arg2 == cand->args[1])
+ return cand->oid;
+ }
+
+ if (was_unknown)
+ {
+ /* arg1 and arg2 are the same here, need only look at arg1 */
+ Oid basetype = getBaseType(arg1);
+
+ if (basetype != arg1)
+ {
+ for (cand = candidates; cand != NULL; cand = cand->next)
+ {
+ if (basetype == cand->args[0] && basetype == cand->args[1])
+ return cand->oid;
+ }
+ }
}
return InvalidOid;