/*-------------------------------------------------------------------------
 *
 * pg_index.h--
 *    definition of the system "index" relation (pg_index)
 *    along with the relation's initial contents.
 *
 *
 * Copyright (c) 1994, Regents of the University of California
 *
 * $Id: pg_index.h,v 1.1 1996/08/28 01:56:49 scrappy Exp $
 *
 * NOTES
 *    the genbki.sh script reads this file and generates .bki
 *    information from the DATA() statements.
 *
 *-------------------------------------------------------------------------
 */
#ifndef PG_INDEX_H
#define PG_INDEX_H

/* ----------------
 *	postgres.h contains the system type definintions and the
 *	CATALOG(), BOOTSTRAP and DATA() sugar words so this file
 *	can be read by both genbki.sh and the C compiler.
 * ----------------
 */
#include "postgres.h"

/* ----------------
 *	pg_index definition.  cpp turns this into
 *	typedef struct FormData_pg_index.  The oid of the index relation
 *	is stored in indexrelid; the oid of the indexed relation is stored
 *	in indrelid.
 * ----------------
 */ 
CATALOG(pg_index) {
    Oid 	indexrelid;
    Oid 	indrelid;
    Oid		indproc; /* registered procedure for functional index */
    int28 	indkey;
    oid8 	indclass;
    bool 	indisclustered;
    bool 	indisarchived;
    text	indpred;	/* query plan for partial index predicate */
    bool	indislossy; /* do we fetch false tuples (lossy compression)? */
    bool	indhaskeytype; /* does key type != attribute type? */
} FormData_pg_index;

#define INDEX_MAX_KEYS 8  /* maximum number of keys in an index definition */

/* ----------------
 *	Form_pg_index corresponds to a pointer to a tuple with
 *	the format of pg_index relation.
 * ----------------
 */
typedef FormData_pg_index	*IndexTupleForm;

/* ----------------
 *	compiler constants for pg_index
 * ----------------
 */
#define Natts_pg_index			10
#define Anum_pg_index_indexrelid	1
#define Anum_pg_index_indrelid		2
#define Anum_pg_index_indproc		3
#define Anum_pg_index_indkey		4
#define Anum_pg_index_indclass		5
#define Anum_pg_index_indisclustered	6
#define Anum_pg_index_indisarchived	7
#define Anum_pg_index_indpred		8
#define Anum_pg_index_indislossy	9
#define Anum_pg_index_indhaskeytype	10


#endif /* PG_INDEX_H */
