src/include/optimizer/plancat.h

   1 /*-------------------------------------------------------------------------
   2  *
   3  * plancat.h
   4  *        prototypes for plancat.c.
   5  *
   6  *
   7  * Copyright (c) 1994, Regents of the University of California
   8  *
   9  * $Id: plancat.h,v 1.12 1999/07/15 23:03:58 momjian Exp $
  10  *
  11  *-------------------------------------------------------------------------
  12  */
  13 #ifndef PLANCAT_H
  14 #define PLANCAT_H
  15
  16 #include "nodes/parsenodes.h"
  17
  18 /*
  19  * transient data structure to hold return value of index_info. Note that
  20  * indexkeys, orderOprs and classlist is "null-terminated".
  21  */
  22 typedef struct IdxInfoRetval
  23 {
  24         Oid                     relid;                  /* OID of the index relation (not the OID
  25                                                                  * of the relation being indexed) */
  26         Oid                     relam;                  /* OID of the pg_am of this index */
  27         int                     pages;                  /* number of pages in the index relation */
  28         int                     tuples;                 /* number of tuples in the index relation */
  29         int                *indexkeys;          /* keys over which we're indexing */
  30         Oid                *orderOprs;          /* operators used for ordering purposes */
  31         Oid                *classlist;          /* classes of AM operators */
  32         Oid                     indproc;
  33         Node       *indpred;
  34 } IdxInfoRetval;
  35
  36
  37 extern void relation_info(Query *root,
  38                           Oid relid,
  39                           bool *hashindex, int *pages,
  40                           int *tuples);
  41
  42 extern bool index_info(Query *root,
  43                    bool first, int relid, IdxInfoRetval *info);
  44
  45 extern Cost restriction_selectivity(Oid functionObjectId,
  46                                                 Oid operatorObjectId,
  47                                                 Oid relationObjectId,
  48                                                 AttrNumber attributeNumber,
  49                                                 char *constValue,
  50                                                 int32 constFlag);
  51
  52 extern void index_selectivity(Oid indid, Oid *classes, List *opnos,
  53                                   Oid relid, List *attnos, List *values, List *flags,
  54                                   int32 nkeys, float *idxPages, float *idxSelec);
  55
  56 extern Cost join_selectivity(Oid functionObjectId, Oid operatorObjectId,
  57                                  Oid relationObjectId1, AttrNumber attributeNumber1,
  58                                  Oid relationObjectId2, AttrNumber attributeNumber2);
  59
  60 extern List *find_inheritance_children(Oid inhparent);
  61
  62 #endif   /* PLANCAT_H */