pg_index.h

来自「PostgreSQL 8.2中增加了很多企业用户所需要的功能和性能上的提高,其开」· C头文件 代码 · 共 81 行

/*-------------------------------------------------------------------------
 *
 * pg_index.h
 *	  definition of the system "index" relation (pg_index)
 *	  along with the relation's initial contents.
 *
 *
 * Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * $PostgreSQL: pgsql/src/include/catalog/pg_index.h,v 1.41 2006/10/04 00:30:07 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

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

/* ----------------
 *		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? */

	/* VARIABLE LENGTH FIELDS: */
	int2vector	indkey;			/* column numbers of indexed cols, or 0 */
	oidvector	indclass;		/* opclass identifiers */
	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					11
#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_indkey			8
#define Anum_pg_index_indclass			9
#define Anum_pg_index_indexprs			10
#define Anum_pg_index_indpred			11

#endif   /* PG_INDEX_H */