/*-------------------------------------------------------------------------
 *
 * pg_statistic_ext.h
 *   definition of the "extended statistics" system catalog
 *   (pg_statistic_ext)
 *
 * Note that pg_statistic_ext contains the definitions of extended statistics
 * objects, created by CREATE STATISTICS, but not the actual statistical data,
 * created by running ANALYZE.
 *
 * Portions Copyright (c) 1996-2025, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/catalog/pg_statistic_ext.h
 *
 * NOTES
 *   The Catalog.pm module reads this file and derives schema
 *   information.
 *
 *-------------------------------------------------------------------------
 */
#ifndef PG_STATISTIC_EXT_H
#define PG_STATISTIC_EXT_H

#include "catalog/genbki.h"
#include "catalog/pg_statistic_ext_d.h" /* IWYU pragma: export */

/* ----------------
 *  pg_statistic_ext definition.  cpp turns this into
 *  typedef struct FormData_pg_statistic_ext
 * ----------------
 */
CATALOG(pg_statistic_ext,3381,StatisticExtRelationId)
{
 Oid   oid;   /* oid */

 Oid   stxrelid BKI_LOOKUP(pg_class); /* relation containing
 * attributes */

 /* These two fields form the unique key for the entry: */
 NameData stxname;  /* statistics object name */
 Oid   stxnamespace BKI_LOOKUP(pg_namespace); /* OID of statistics
 * object's namespace */

 Oid   stxowner BKI_LOOKUP(pg_authid); /* statistics object's owner */

 /*
  * variable-length/nullable fields start here, but we allow direct access
  * to stxkeys
 */
 int2vector stxkeys BKI_FORCE_NOT_NULL; /* array of column keys */

#ifdef CATALOG_VARLEN
 int16  stxstattarget BKI_DEFAULT(_null_) BKI_FORCE_NULL; /* statistics target */
 char  stxkind[1] BKI_FORCE_NOT_NULL; /* statistics kinds requested
 * to build */
 pg_node_tree stxexprs;  /* A list of expression trees for stats
         * attributes that are not simple column
 * references. */
#endif

} FormData_pg_statistic_ext;

/* ----------------
 *  Form_pg_statistic_ext corresponds to a pointer to a tuple with
 *  the format of pg_statistic_ext relation.
 * ----------------
 */
typedef FormData_pg_statistic_ext *Form_pg_statistic_ext;

DECLARE_TOAST(pg_statistic_ext, 3439, 3440);

DECLARE_UNIQUE_INDEX_PKEY(pg_statistic_ext_oid_index, 3380, StatisticExtOidIndexId, pg_statistic_ext, btree(oid oid_ops));
DECLARE_UNIQUE_INDEX(pg_statistic_ext_name_index, 3997, StatisticExtNameIndexId, pg_statistic_ext, btree(stxname name_ops, stxnamespace oid_ops));
DECLARE_INDEX(pg_statistic_ext_relid_index, 3379, StatisticExtRelidIndexId, pg_statistic_ext, btree(stxrelid oid_ops));

MAKE_SYSCACHE(STATEXTOID, pg_statistic_ext_oid_index, 4);
MAKE_SYSCACHE(STATEXTNAMENSP, pg_statistic_ext_name_index, 4);

DECLARE_ARRAY_FOREIGN_KEY((stxrelid, stxkeys), pg_attribute, (attrelid, attnum));

#ifdef EXPOSE_TO_CLIENT_CODE

#define STATS_EXT_NDISTINCT   'd'
#define STATS_EXT_DEPENDENCIES  'f'
#define STATS_EXT_MCV    'm'
#define STATS_EXT_EXPRESSIONS  'e'

#endif       /* EXPOSE_TO_CLIENT_CODE */

#endif       /* PG_STATISTIC_EXT_H */