granicus.if.org Git - postgresql/blob - src/include/catalog/pg_statistic_ext.h

   1 /*-------------------------------------------------------------------------
   2  *
   3  * pg_statistic_ext.h
   4  *        definition of the system "extended statistic" relation (pg_statistic_ext)
   5  *        along with the relation's initial contents.
   6  *
   7  *
   8  * Portions Copyright (c) 1996-2017, PostgreSQL Global Development Group
   9  * Portions Copyright (c) 1994, Regents of the University of California
  10  *
  11  * src/include/catalog/pg_statistic_ext.h
  12  *
  13  * NOTES
  14  *        the genbki.pl script reads this file and generates .bki
  15  *        information from the DATA() statements.
  16  *
  17  *-------------------------------------------------------------------------
  18  */
  19 #ifndef PG_STATISTIC_EXT_H
  20 #define PG_STATISTIC_EXT_H
  21
  22 #include "catalog/genbki.h"
  23
  24 /* ----------------
  25  *              pg_statistic_ext definition.  cpp turns this into
  26  *              typedef struct FormData_pg_statistic_ext
  27  * ----------------
  28  */
  29 #define StatisticExtRelationId  3381
  30
  31 CATALOG(pg_statistic_ext,3381)
  32 {
  33         Oid                     stxrelid;               /* relation containing attributes */
  34
  35         /* These two fields form the unique key for the entry: */
  36         NameData        stxname;                /* statistics object name */
  37         Oid                     stxnamespace;   /* OID of statistics object's namespace */
  38
  39         Oid                     stxowner;               /* statistics object's owner */
  40
  41         /*
  42          * variable-length fields start here, but we allow direct access to
  43          * stxkeys
  44          */
  45         int2vector      stxkeys;                /* array of column keys */
  46
  47 #ifdef CATALOG_VARLEN
  48         char            stxkind[1] BKI_FORCE_NOT_NULL;          /* statistic types
  49                                                                                                          * requested to build */
  50         pg_ndistinct stxndistinct;      /* ndistinct coefficients (serialized) */
  51         pg_dependencies stxdependencies;        /* dependencies (serialized) */
  52 #endif
  53
  54 } FormData_pg_statistic_ext;
  55
  56 /* ----------------
  57  *              Form_pg_statistic_ext corresponds to a pointer to a tuple with
  58  *              the format of pg_statistic_ext relation.
  59  * ----------------
  60  */
  61 typedef FormData_pg_statistic_ext *Form_pg_statistic_ext;
  62
  63 /* ----------------
  64  *              compiler constants for pg_statistic_ext
  65  * ----------------
  66  */
  67 #define Natts_pg_statistic_ext                                  8
  68 #define Anum_pg_statistic_ext_stxrelid                  1
  69 #define Anum_pg_statistic_ext_stxname                   2
  70 #define Anum_pg_statistic_ext_stxnamespace              3
  71 #define Anum_pg_statistic_ext_stxowner                  4
  72 #define Anum_pg_statistic_ext_stxkeys                   5
  73 #define Anum_pg_statistic_ext_stxkind                   6
  74 #define Anum_pg_statistic_ext_stxndistinct              7
  75 #define Anum_pg_statistic_ext_stxdependencies   8
  76
  77 #define STATS_EXT_NDISTINCT                     'd'
  78 #define STATS_EXT_DEPENDENCIES          'f'
  79
  80 #endif   /* PG_STATISTIC_EXT_H */