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First cut at unifying regular selectivity estimation with indexscan

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selectivity estimation wasn't right.  This is better...
This commit is contained in:
Tom Lane
2000-01-23 02:07:00 +00:00
parent 49581f9848
commit 8449df8a67
5 changed files with 136 additions and 72 deletions
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23
src/include/optimizer/cost.h
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@@ -6,7 +6,7 @@
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: cost.h,v 1.26 2000/01/22 23:50:26 tgl Exp $
* $Id: cost.h,v 1.27 2000/01/23 02:06:57 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -15,15 +15,16 @@
#include "nodes/relation.h"
/* defaults for costsize.c's Cost parameters */
/* NB: cost-estimation code should use the variables, not the constants! */
#define CPU_PAGE_WEIGHT 0.033
#define CPU_INDEX_PAGE_WEIGHT 0.017
/* defaults for function attributes used for expensive function calculations */
#define BYTE_PCT 100
#define PERBYTE_CPU 0
#define PERCALL_CPU 0
#define OUTIN_RATIO 100
/* defaults for costsize.c's Cost parameters */
/* NB: cost-estimation code should use the variables, not the constants! */
#define CPU_PAGE_WEIGHT 0.033
#define CPU_INDEX_PAGE_WEIGHT 0.017
/*
@@ -61,8 +62,14 @@ extern void set_joinrel_rows_width(Query *root, RelOptInfo *rel,
* prototypes for clausesel.c
* routines to compute clause selectivities
*/
extern Selectivity restrictlist_selec(Query *root, List *restrictinfo_list);
extern Selectivity clauselist_selec(Query *root, List *clauses);
extern Selectivity compute_clause_selec(Query *root, Node *clause);
extern Selectivity restrictlist_selectivity(Query *root,
List *restrictinfo_list,
int varRelid);
extern Selectivity clauselist_selectivity(Query *root,
List *clauses,
int varRelid);
extern Selectivity clause_selectivity(Query *root,
Node *clause,
int varRelid);
#endif /* COST_H */