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 1.4 1997/09/07 04:59:15 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
  38 relation_info(Query * root,
  39                           Oid relid,
  40                           bool * hashindex, int *pages,
  41                           int *tuples);
  42
  43 extern bool
  44 index_info(Query * root,
  45                    bool first, int relid, IdxInfoRetval * info);
  46
  47 extern                  Cost
  48 restriction_selectivity(Oid functionObjectId,
  49                                                 Oid operatorObjectId,
  50                                                 Oid relationObjectId,
  51                                                 AttrNumber attributeNumber,
  52                                                 char *constValue,
  53                                                 int32 constFlag);
  54
  55 extern void
  56 index_selectivity(Oid indid, Oid * classes, List * opnos,
  57                                   Oid relid, List * attnos, List * values, List * flags,
  58                                   int32 nkeys, float *idxPages, float *idxSelec);
  59
  60 extern Cost
  61 join_selectivity(Oid functionObjectId, Oid operatorObjectId,
  62                                  Oid relationObjectId1, AttrNumber attributeNumber1,
  63                                  Oid relationObjectId2, AttrNumber attributeNumber2);
  64
  65 extern List    *find_inheritance_children(Oid inhparent);
  66 extern List    *VersionGetParents(Oid verrelid);
  67
  68 #endif                                                  /* PLANCAT_H */