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pg_statistic_ext.h
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1 /*-------------------------------------------------------------------------
2  *
3  * pg_statistic_ext.h
4  * definition of the "extended statistics" system catalog
5  * (pg_statistic_ext)
6  *
7  * Note that pg_statistic_ext contains the definitions of extended statistics
8  * objects, created by CREATE STATISTICS, but not the actual statistical data,
9  * created by running ANALYZE.
10  *
11  * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
12  * Portions Copyright (c) 1994, Regents of the University of California
13  *
14  * src/include/catalog/pg_statistic_ext.h
15  *
16  * NOTES
17  * The Catalog.pm module reads this file and derives schema
18  * information.
19  *
20  *-------------------------------------------------------------------------
21  */
22 #ifndef PG_STATISTIC_EXT_H
23 #define PG_STATISTIC_EXT_H
24 
25 #include "catalog/genbki.h"
26 #include "catalog/pg_statistic_ext_d.h"
27 
28 /* ----------------
29  * pg_statistic_ext definition. cpp turns this into
30  * typedef struct FormData_pg_statistic_ext
31  * ----------------
32  */
33 CATALOG(pg_statistic_ext,3381,StatisticExtRelationId)
34 {
35  Oid oid; /* oid */
36 
37  Oid stxrelid BKI_LOOKUP(pg_class); /* relation containing
38  * attributes */
39 
40  /* These two fields form the unique key for the entry: */
41  NameData stxname; /* statistics object name */
42  Oid stxnamespace BKI_LOOKUP(pg_namespace); /* OID of statistics
43  * object's namespace */
44 
45  Oid stxowner BKI_LOOKUP(pg_authid); /* statistics object's owner */
46  int32 stxstattarget BKI_DEFAULT(-1); /* statistics target */
47 
48  /*
49  * variable-length fields start here, but we allow direct access to
50  * stxkeys
51  */
52  int2vector stxkeys BKI_FORCE_NOT_NULL; /* array of column keys */
53 
54 #ifdef CATALOG_VARLEN
55  char stxkind[1] BKI_FORCE_NOT_NULL; /* statistics kinds requested
56  * to build */
57  pg_node_tree stxexprs; /* A list of expression trees for stats
58  * attributes that are not simple column
59  * references. */
60 #endif
61 
63 
64 /* ----------------
65  * Form_pg_statistic_ext corresponds to a pointer to a tuple with
66  * the format of pg_statistic_ext relation.
67  * ----------------
68  */
70 
71 DECLARE_TOAST(pg_statistic_ext, 3439, 3440);
72 
73 DECLARE_UNIQUE_INDEX_PKEY(pg_statistic_ext_oid_index, 3380, StatisticExtOidIndexId, on pg_statistic_ext using btree(oid oid_ops));
74 DECLARE_UNIQUE_INDEX(pg_statistic_ext_name_index, 3997, StatisticExtNameIndexId, on pg_statistic_ext using btree(stxname name_ops, stxnamespace oid_ops));
75 DECLARE_INDEX(pg_statistic_ext_relid_index, 3379, StatisticExtRelidIndexId, on pg_statistic_ext using btree(stxrelid oid_ops));
76 
77 DECLARE_ARRAY_FOREIGN_KEY((stxrelid, stxkeys), pg_attribute, (attrelid, attnum));
78 
79 #ifdef EXPOSE_TO_CLIENT_CODE
80 
81 #define STATS_EXT_NDISTINCT 'd'
82 #define STATS_EXT_DEPENDENCIES 'f'
83 #define STATS_EXT_MCV 'm'
84 #define STATS_EXT_EXPRESSIONS 'e'
85 
86 #endif /* EXPOSE_TO_CLIENT_CODE */
87 
88 #endif /* PG_STATISTIC_EXT_H */
DECLARE_UNIQUE_INDEX_PKEY(pg_statistic_ext_oid_index, 3380, StatisticExtOidIndexId, on pg_statistic_ext using btree(oid oid_ops))
CATALOG(pg_statistic_ext, 3381, StatisticExtRelationId)
DECLARE_TOAST(pg_statistic_ext, 3439, 3440)
DECLARE_INDEX(pg_statistic_ext_relid_index, 3379, StatisticExtRelidIndexId, on pg_statistic_ext using btree(stxrelid oid_ops))
unsigned int Oid
Definition: postgres_ext.h:31
#define BKI_DEFAULT(value)
Definition: genbki.h:35
signed int int32
Definition: c.h:429
#define BKI_FORCE_NOT_NULL
Definition: genbki.h:33
Definition: c.h:675
FormData_pg_statistic_ext
#define BKI_LOOKUP(catalog)
Definition: genbki.h:46
DECLARE_UNIQUE_INDEX(pg_statistic_ext_name_index, 3997, StatisticExtNameIndexId, on pg_statistic_ext using btree(stxname name_ops, stxnamespace oid_ops))
Definition: c.h:649
DECLARE_ARRAY_FOREIGN_KEY((stxrelid, stxkeys), pg_attribute,(attrelid, attnum))
int16 attnum
Definition: pg_attribute.h:83
FormData_pg_statistic_ext * Form_pg_statistic_ext