* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $Id: nbtree.h,v 1.50 2001/01/24 19:43:19 momjian Exp $
+ * $Id: nbtree.h,v 1.51 2001/02/07 23:34:18 vadim Exp $
*
*-------------------------------------------------------------------------
*/
#define BTREE_METAPAGE 0 /* first page is meta */
#define BTREE_MAGIC 0x053162
+#define BTreeInvalidParent(opaque) \
+ (opaque->btpo_parent == InvalidBlockNumber || \
+ opaque->btpo_parent == BTREE_METAPAGE)
+
#define BTREE_VERSION 1
typedef struct BTMetaPageData