Create a 'type cache' that keeps track of the data needed for any particular

datatype by array_eq and array_cmp; use this to solve problems with memory
leaks in array indexing support.  The parser's equality_oper and ordering_oper
routines also use the cache.  Change the operator search algorithms to look
for appropriate btree or hash index opclasses, instead of assuming operators
named '<' or '=' have the right semantics.  (ORDER BY ASC/DESC now also look
at opclasses, instead of assuming '<' and '>' are the right things.)  Add
several more index opclasses so that there is no regression in functionality
for base datatypes.  initdb forced due to catalog additions.

1 files changed, 18 insertions, 1 deletions

diff --git a/src/backend/utils/adt/acl.c b/src/backend/utils/adt/acl.c
index 504e8f55652..8d5a675006b 100644
--- a/src/backend/utils/adt/acl.c
+++ b/src/backend/utils/adt/acl.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/adt/acl.c,v 1.95 2003/08/14 14:19:07 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/adt/acl.c,v 1.96 2003/08/17 19:58:05 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -481,6 +481,23 @@ aclitem_eq(PG_FUNCTION_ARGS)
 }
 
 /*
+ * aclitem hash function
+ *
+ * We make aclitems hashable not so much because anyone is likely to hash
+ * them, as because we want array equality to work on aclitem arrays, and
+ * with the typcache mechanism we must have a hash or btree opclass.
+ */
+Datum
+hash_aclitem(PG_FUNCTION_ARGS)
+{
+	AclItem    *a = PG_GETARG_ACLITEM_P(0);
+
+	/* not very bright, but avoids any issue of padding in struct */
+	PG_RETURN_UINT32((uint32) (a->ai_privs + a->ai_grantee + a->ai_grantor));
+}
+
+
+/*
  * acldefault()  --- create an ACL describing default access permissions
  *
  * Change this routine if you want to alter the default access policy for