1 files changed, 74 insertions, 0 deletions
diff --git a/src/include/catalog/pg_statistic_ext.h b/src/include/catalog/pg_statistic_ext.h
new file mode 100644
index 0000000..a8cb169
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+++ b/src/include/catalog/pg_statistic_ext.h
@@ -0,0 +1,74 @@
+/*-------------------------------------------------------------------------
+ *
+ * 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) 1996-2020, 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;		/* relation containing attributes */
+
+	/* These two fields form the unique key for the entry: */
+	NameData	stxname;		/* statistics object name */
+	Oid			stxnamespace;	/* OID of statistics object's namespace */
+
+	Oid			stxowner;		/* 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;		/* array of column keys */
+
+#ifdef CATALOG_VARLEN
+	char		stxkind[1] BKI_FORCE_NOT_NULL;	/* statistics kinds requested
+												 * to build */
+#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;
+
+#ifdef EXPOSE_TO_CLIENT_CODE
+
+#define STATS_EXT_NDISTINCT			'd'
+#define STATS_EXT_DEPENDENCIES		'f'
+#define STATS_EXT_MCV				'm'
+
+#endif							/* EXPOSE_TO_CLIENT_CODE */
+
+#endif							/* PG_STATISTIC_EXT_H */