/*-------------------------------------------------------------------------
*
* pg_index.h
* definition of the system "index" relation (pg_index)
* along with the relation's initial contents.
*
*
* Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/catalog/pg_index.h,v 1.47 2009/01/01 17:23:57 momjian 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
#include "catalog/genbki.h"
/* ----------------
* pg_index definition. cpp turns this into
* typedef struct FormData_pg_index.
* ----------------
*/
#define IndexRelationId 2610
CATALOG(pg_index,2610) BKI_WITHOUT_OIDS
{
Oid indexrelid; /* OID of the index */
Oid indrelid; /* OID of the relation it indexes */
int2 indnatts; /* number of columns in index */
bool indisunique; /* is this a unique index? */
bool indisprimary; /* is this index for primary key? */
bool indisclustered; /* is this the index last clustered by? */
bool indisvalid; /* is this index valid for use by queries? */
bool indcheckxmin; /* must we wait for xmin to be old? */
bool indisready; /* is this index ready for inserts? */
/* VARIABLE LENGTH FIELDS: */
int2vector indkey; /* column numbers of indexed cols, or 0 */
oidvector indclass; /* opclass identifiers */
int2vector indoption; /* per-column flags (AM-specific meanings) */
text indexprs; /* expression trees for index attributes that
* are not simple column references; one for
* each zero entry in indkey[] */
text indpred; /* expression tree for predicate, if a partial
* index; else NULL */
} FormData_pg_index;
/* ----------------
* Form_pg_index corresponds to a pointer to a tuple with
* the format of pg_index relation.
* ----------------
*/
typedef FormData_pg_index *Form_pg_index;
/* ----------------
* compiler constants for pg_index
* ----------------
*/
#define Natts_pg_index 14
#define Anum_pg_index_indexrelid 1
#define Anum_pg_index_indrelid 2
#define Anum_pg_index_indnatts 3
#define Anum_pg_index_indisunique 4
#define Anum_pg_index_indisprimary 5
#define Anum_pg_index_indisclustered 6
#define Anum_pg_index_indisvalid 7
#define Anum_pg_index_indcheckxmin 8
#define Anum_pg_index_indisready 9
#define Anum_pg_index_indkey 10
#define Anum_pg_index_indclass 11
#define Anum_pg_index_indoption 12
#define Anum_pg_index_indexprs 13
#define Anum_pg_index_indpred 14
/*
* Index AMs that support ordered scans must support these two indoption
* bits. Otherwise, the content of the per-column indoption fields is
* open for future definition.
*/
#define INDOPTION_DESC 0x0001 /* values are in reverse order */
#define INDOPTION_NULLS_FIRST 0x0002 /* NULLs are first instead of last */
/*
* Use of these macros is recommended over direct examination of the state
* flag columns where possible; this allows source code compatibility with
* 9.2 and up.
*/
#define IndexIsValid(indexForm) ((indexForm)->indisvalid)
#define IndexIsReady(indexForm) ((indexForm)->indisready)
#endif /* PG_INDEX_H */
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