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db_include/catalog/pg_statistic_ext.h

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+/*-------------------------------------------------------------------------
+ *
+ * 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) 1996-2021, 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"
+
+/* ----------------
+ *		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 */
+	int32		stxstattarget BKI_DEFAULT(-1);	/* statistics target */
+
+	/*
+	 * variable-length fields start here, but we allow direct access to
+	 * stxkeys
+	 */
+	int2vector	stxkeys BKI_FORCE_NOT_NULL; /* array of column keys */
+
+#ifdef CATALOG_VARLEN
+	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, on pg_statistic_ext using btree(oid oid_ops));
+#define StatisticExtOidIndexId	3380
+DECLARE_UNIQUE_INDEX(pg_statistic_ext_name_index, 3997, on pg_statistic_ext using btree(stxname name_ops, stxnamespace oid_ops));
+#define StatisticExtNameIndexId 3997
+DECLARE_INDEX(pg_statistic_ext_relid_index, 3379, on pg_statistic_ext using btree(stxrelid oid_ops));
+#define StatisticExtRelidIndexId 3379
+
+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 */