diff options
Diffstat (limited to 'src/include/optimizer/cost.h')
| -rw-r--r-- | src/include/optimizer/cost.h | 30 |
1 files changed, 19 insertions, 11 deletions
diff --git a/src/include/optimizer/cost.h b/src/include/optimizer/cost.h index c654b6953e7..9c16fc8fea6 100644 --- a/src/include/optimizer/cost.h +++ b/src/include/optimizer/cost.h @@ -6,7 +6,7 @@ * * Copyright (c) 1994, Regents of the University of California * - * $Id: cost.h,v 1.25 2000/01/09 00:26:46 tgl Exp $ + * $Id: cost.h,v 1.26 2000/01/22 23:50:26 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -20,23 +20,31 @@ #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 + /* * prototypes for costsize.c * routines to compute costs and sizes */ -extern bool _enable_seqscan_; -extern bool _enable_indexscan_; -extern bool _enable_sort_; -extern bool _enable_nestloop_; -extern bool _enable_mergejoin_; -extern bool _enable_hashjoin_; -extern bool _enable_tidscan_; + +extern Cost cpu_page_weight; +extern Cost cpu_index_page_weight; +extern Cost disable_cost; +extern bool enable_seqscan; +extern bool enable_indexscan; +extern bool enable_tidscan; +extern bool enable_sort; +extern bool enable_nestloop; +extern bool enable_mergejoin; +extern bool enable_hashjoin; extern Cost cost_seqscan(RelOptInfo *baserel); -extern Cost cost_index(RelOptInfo *baserel, IndexOptInfo *index, - long expected_indexpages, Selectivity selec, - bool is_injoin); +extern Cost cost_index(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, |