Create an ALTER DEFAULT PRIVILEGES command, which allows users to adjust

the privileges that will be applied to subsequently-created objects.

Such adjustments are always per owning role, and can be restricted to objects
created in particular schemas too.  A notable benefit is that users can
override the traditional default privilege settings, eg, the PUBLIC EXECUTE
privilege traditionally granted by default for functions.

Petr Jelinek

src/include/nodes/parsenodes.h

@@ -13,7 +13,7 @@
  * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/nodes/parsenodes.h,v 1.402 2009/09/22 23:43:41 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/nodes/parsenodes.h,v 1.403 2009/10/05 19:24:48 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -1259,6 +1259,17 @@ typedef struct GrantRoleStmt
 	DropBehavior behavior;		/* drop behavior (for REVOKE) */
 } GrantRoleStmt;
 
+/* ----------------------
+ *	Alter Default Privileges Statement
+ * ----------------------
+ */
+typedef struct AlterDefaultPrivilegesStmt
+{
+	NodeTag		type;
+	List	   *options;		/* list of DefElem */
+	GrantStmt  *action;			/* GRANT/REVOKE action (with objects=NIL) */
+} AlterDefaultPrivilegesStmt;
+
 /* ----------------------
  *		Copy Statement
  *