It was comparing the wrong pair of columns, which triggered the previously

petere · petere · commit ae20518c7e46 · 2003-06-29T10:18:26.000Z
mentioned bug.
diff --git a/src/backend/catalog/information_schema.sql b/src/backend/catalog/information_schema.sql
@@ -4,7 +4,7 @@
  *
  * Copyright 2003, PostgreSQL Global Development Group
  *
- * $Id: information_schema.sql,v 1.10 2003/06/28 20:50:08 petere Exp $
+ * $Id: information_schema.sql,v 1.11 2003/06/29 10:18:26 petere Exp $
  */
 
 /*
@@ -1496,7 +1496,7 @@ CREATE VIEW element_types AS
           AND at.typelem = bt.oid
           AND nbt.oid = bt.typnamespace
 
-          AND (x.objschema, x.objname, x.objtype, x.objtypeid) IN
+          AND (n.nspname, x.objname, x.objtype, x.objtypeid) IN
               ( SELECT object_schema, object_name, object_type, dtd_identifier
                     FROM data_type_privileges );
 

Original file line number	Diff line number	Diff line change
`@@ -4,7 +4,7 @@`
`4`	`4`	`*`
`5`	`5`	`* Copyright 2003, PostgreSQL Global Development Group`
`6`	`6`	`*`
`7`		`- * $Id: information_schema.sql,v 1.10 2003/06/28 20:50:08 petere Exp $`
	`7`	`+ * $Id: information_schema.sql,v 1.11 2003/06/29 10:18:26 petere Exp $`
`8`	`8`	`*/`
`9`	`9`
`10`	`10`	`/*`
`@@ -1496,7 +1496,7 @@ CREATE VIEW element_types AS`
`1496`	`1496`	`AND at.typelem = bt.oid`
`1497`	`1497`	`AND nbt.oid = bt.typnamespace`
`1498`	`1498`
`1499`		`- AND (x.objschema, x.objname, x.objtype, x.objtypeid) IN`
	`1499`	`+ AND (n.nspname, x.objname, x.objtype, x.objtypeid) IN`
`1500`	`1500`	`( SELECT object_schema, object_name, object_type, dtd_identifier`
`1501`	`1501`	`FROM data_type_privileges );`
`1502`	`1502`