index b8555c46153b8d17c8b90c44dc8403c258f68c3f..16ed3a11ed5e8c4260f3a23e52c7a717ebd937d8 100644 (file)
*
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/parser/parse_oper.c,v 1.108 2009年06月11日 14:49:00 momjian Exp $
+ * $PostgreSQL: pgsql/src/backend/parser/parse_oper.c,v 1.109 2009年06月13日 15:42:09 tgl Exp $
*
*-------------------------------------------------------------------------
*/
* If the datatype is an array, then we can use array_lt and friends ...
* but only if there are suitable operators for the element type. (This
* check is not in the raw typcache.c code ... should it be?) Testing all
- * three operator IDs here should be redundant.
+ * three operator IDs here should be redundant, but let's do it anyway.
*/
if (lt_opr == ARRAY_LT_OP ||
eq_opr == ARRAY_EQ_OP ||
{
typentry = lookup_type_cache(elem_type,
TYPECACHE_LT_OPR | TYPECACHE_EQ_OPR | TYPECACHE_GT_OPR);
- if (!OidIsValid(typentry->lt_opr))
- lt_opr = InvalidOid; /* element type has no "<" */
+#ifdef NOT_USED
+ /* We should do this ... */
if (!OidIsValid(typentry->eq_opr))
- eq_opr = InvalidOid; /* element type has no "=" */
- if (!OidIsValid(typentry->gt_opr))
- gt_opr = InvalidOid; /* element type has no ">" */
+ {
+ /* element type is neither sortable nor hashable */
+ lt_opr = eq_opr = gt_opr = InvalidOid;
+ }
+ else if (!OidIsValid(typentry->lt_opr) ||
+ !OidIsValid(typentry->gt_opr))
+ {
+ /* element type is hashable but not sortable */
+ lt_opr = gt_opr = InvalidOid;
+ }
+#else
+ /*
+ * ... but for the moment we have to do this. This is because
+ * anyarray has sorting but not hashing support. So, if the
+ * element type is only hashable, there is nothing we can do
+ * with the array type.
+ */
+ if (!OidIsValid(typentry->lt_opr) ||
+ !OidIsValid(typentry->eq_opr) ||
+ !OidIsValid(typentry->gt_opr))
+ lt_opr = eq_opr = gt_opr = InvalidOid; /* not sortable */
+#endif
}
else
lt_opr = eq_opr = gt_opr = InvalidOid; /* bogus array type? */