Quelle  pg_statistic_ext_data.h

/*-------------------------------------------------------------------------
 *
 * pg_statistic_ext_data.h
 *   definition of the "extended statistics data" system catalog
 *   (pg_statistic_ext_data)
 *
 * This catalog stores the statistical data for extended statistics objects.
 *
 * 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_data.h
 *
 * NOTES
 *   The Catalog.pm module reads this file and derives schema
 *   information.
 *
 *-------------------------------------------------------------------------
 */
#ifndef PG_STATISTIC_EXT_DATA_H
#define PG_STATISTIC_EXT_DATA_H

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

/* ----------------
 *  pg_statistic_ext_data definition.  cpp turns this into
 *  typedef struct FormData_pg_statistic_ext_data
 * ----------------
 */
CATALOG(pg_statistic_ext_data,3429,StatisticExtDataRelationId)
{
 Oid   stxoid BKI_LOOKUP(pg_statistic_ext); /* statistics object
 * this data is for */
 bool  stxdinherit; /* true if inheritance children are included */

#ifdef CATALOG_VARLEN   /* variable-length fields start here */

 pg_ndistinct stxdndistinct; /* ndistinct coefficients (serialized) */
 pg_dependencies stxddependencies; /* dependencies (serialized) */
 pg_mcv_list stxdmcv;  /* MCV (serialized) */
 pg_statistic stxdexpr[1]; /* stats for expressions */

#endif

} FormData_pg_statistic_ext_data;

/* ----------------
 *  Form_pg_statistic_ext_data corresponds to a pointer to a tuple with
 *  the format of pg_statistic_ext_data relation.
 * ----------------
 */
typedef FormData_pg_statistic_ext_data *Form_pg_statistic_ext_data;

DECLARE_TOAST(pg_statistic_ext_data, 3430, 3431);

DECLARE_UNIQUE_INDEX_PKEY(pg_statistic_ext_data_stxoid_inh_index, 3433, StatisticExtDataStxoidInhIndexId, pg_statistic_ext_data, btree(stxoid oid_ops, stxdinherit bool_ops));

MAKE_SYSCACHE(STATEXTDATASTXOID, pg_statistic_ext_data_stxoid_inh_index, 4);

#endif       /* PG_STATISTIC_EXT_DATA_H */