The CONSTROID syscache should show conrelid as a relation OID column.

Not clear that there's any observable bug at present from this omission,
but it seems like something to fix going forward.

src/backend/utils/cache/syscache.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/cache/syscache.c,v 1.114 2008/01/01 19:45:53 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/cache/syscache.c,v 1.115 2008/05/07 01:46:04 tgl Exp $
  *
  * NOTES
  *	  These routines allow the parser/planner/executor to perform
@@ -53,9 +53,8 @@
 
 	Adding system caches:
 
-	Add your new cache to the list in include/utils/syscache.h.  Keep
-	the list sorted alphabetically and adjust the cache numbers
-	accordingly.
+	Add your new cache to the list in include/utils/syscache.h.
+	Keep the list sorted alphabetically.
 
 	Add your entry to the cacheinfo[] array below. All cache lists are
 	alphabetical, so add it in the proper place.  Specify the relation OID,
@@ -307,7 +306,7 @@ static const struct cachedesc cacheinfo[] = {
 	},
 	{ConstraintRelationId,		/* CONSTROID */
 		ConstraintOidIndexId,
-		0,
+		Anum_pg_constraint_conrelid,
 		1,
 		{
 			ObjectIdAttributeNumber,