diff options
Diffstat (limited to 'src/include/optimizer/cost.h')
| -rw-r--r-- | src/include/optimizer/cost.h | 40 |
1 files changed, 25 insertions, 15 deletions
diff --git a/src/include/optimizer/cost.h b/src/include/optimizer/cost.h index 79153c01d8..960a2ea9e9 100644 --- a/src/include/optimizer/cost.h +++ b/src/include/optimizer/cost.h @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2000, PostgreSQL, Inc * Portions Copyright (c) 1994, Regents of the University of California * - * $Id: cost.h,v 1.29 2000/02/07 04:41:04 tgl Exp $ + * $Id: cost.h,v 1.30 2000/02/15 20:49:25 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -17,9 +17,12 @@ #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 +/* NB: cost-estimation code should use the variables, not these constants! */ +#define DEFAULT_EFFECTIVE_CACHE_SIZE 1000.0 /* measured in pages */ +#define DEFAULT_RANDOM_PAGE_COST 4.0 +#define DEFAULT_CPU_TUPLE_COST 0.01 +#define DEFAULT_CPU_INDEX_TUPLE_COST 0.001 +#define DEFAULT_CPU_OPERATOR_COST 0.0025 /* defaults for function attributes used for expensive function calculations */ #define BYTE_PCT 100 @@ -33,8 +36,12 @@ * routines to compute costs and sizes */ -extern Cost cpu_page_weight; -extern Cost cpu_index_page_weight; +/* parameter variables and flags */ +extern double effective_cache_size; +extern Cost random_page_cost; +extern Cost cpu_tuple_cost; +extern Cost cpu_index_tuple_cost; +extern Cost cpu_operator_cost; extern Cost disable_cost; extern bool enable_seqscan; extern bool enable_indexscan; @@ -44,17 +51,20 @@ extern bool enable_nestloop; extern bool enable_mergejoin; extern bool enable_hashjoin; -extern Cost cost_seqscan(RelOptInfo *baserel); -extern Cost cost_index(Query *root, RelOptInfo *baserel, IndexOptInfo *index, +extern void cost_seqscan(Path *path, RelOptInfo *baserel); +extern void cost_index(Path *path, Query *root, + RelOptInfo *baserel, IndexOptInfo *index, List *indexQuals, bool is_injoin); -extern Cost cost_tidscan(RelOptInfo *baserel, List *tideval); -extern Cost cost_sort(List *pathkeys, double tuples, int width); -extern Cost cost_nestloop(Path *outer_path, Path *inner_path, - bool is_indexjoin); -extern Cost cost_mergejoin(Path *outer_path, Path *inner_path, +extern void cost_tidscan(Path *path, RelOptInfo *baserel, List *tideval); +extern void cost_sort(Path *path, List *pathkeys, double tuples, int width); +extern void cost_nestloop(Path *path, Path *outer_path, Path *inner_path, + List *restrictlist, bool is_indexjoin); +extern void cost_mergejoin(Path *path, Path *outer_path, Path *inner_path, + List *restrictlist, List *outersortkeys, List *innersortkeys); -extern Cost cost_hashjoin(Path *outer_path, Path *inner_path, - Selectivity innerdisbursion); +extern void cost_hashjoin(Path *path, Path *outer_path, Path *inner_path, + List *restrictlist, Selectivity innerdisbursion); +extern Cost cost_qual_eval(List *quals); extern void set_baserel_size_estimates(Query *root, RelOptInfo *rel); extern void set_joinrel_size_estimates(Query *root, RelOptInfo *rel, RelOptInfo *outer_rel, |