diff options
Diffstat (limited to 'src/include/optimizer/cost.h')
| -rw-r--r-- | src/include/optimizer/cost.h | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/src/include/optimizer/cost.h b/src/include/optimizer/cost.h new file mode 100644 index 0000000..6141654 --- /dev/null +++ b/src/include/optimizer/cost.h @@ -0,0 +1,206 @@ +/*------------------------------------------------------------------------- + * + * cost.h + * prototypes for costsize.c and clausesel.c. + * + * + * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group + * Portions Copyright (c) 1994, Regents of the University of California + * + * src/include/optimizer/cost.h + * + *------------------------------------------------------------------------- + */ +#ifndef COST_H +#define COST_H + +#include "nodes/pathnodes.h" +#include "nodes/plannodes.h" + + +/* defaults for costsize.c's Cost parameters */ +/* NB: cost-estimation code should use the variables, not these constants! */ +/* If you change these, update backend/utils/misc/postgresql.sample.conf */ +#define DEFAULT_SEQ_PAGE_COST 1.0 +#define DEFAULT_RANDOM_PAGE_COST 4.0 +#define DEFAULT_CPU_TUPLE_COST 0.01 +#define DEFAULT_CPU_INDEX_TUPLE_COST 0.005 +#define DEFAULT_CPU_OPERATOR_COST 0.0025 +#define DEFAULT_PARALLEL_TUPLE_COST 0.1 +#define DEFAULT_PARALLEL_SETUP_COST 1000.0 + +#define DEFAULT_EFFECTIVE_CACHE_SIZE 524288 /* measured in pages */ + +typedef enum +{ + CONSTRAINT_EXCLUSION_OFF, /* do not use c_e */ + CONSTRAINT_EXCLUSION_ON, /* apply c_e to all rels */ + CONSTRAINT_EXCLUSION_PARTITION /* apply c_e to otherrels only */ +} ConstraintExclusionType; + + +/* + * prototypes for costsize.c + * routines to compute costs and sizes + */ + +/* parameter variables and flags (see also optimizer.h) */ +extern PGDLLIMPORT Cost disable_cost; +extern PGDLLIMPORT int max_parallel_workers_per_gather; +extern PGDLLIMPORT bool enable_seqscan; +extern PGDLLIMPORT bool enable_indexscan; +extern PGDLLIMPORT bool enable_indexonlyscan; +extern PGDLLIMPORT bool enable_bitmapscan; +extern PGDLLIMPORT bool enable_tidscan; +extern PGDLLIMPORT bool enable_sort; +extern PGDLLIMPORT bool enable_incremental_sort; +extern PGDLLIMPORT bool enable_hashagg; +extern PGDLLIMPORT bool enable_nestloop; +extern PGDLLIMPORT bool enable_material; +extern PGDLLIMPORT bool enable_mergejoin; +extern PGDLLIMPORT bool enable_hashjoin; +extern PGDLLIMPORT bool enable_gathermerge; +extern PGDLLIMPORT bool enable_partitionwise_join; +extern PGDLLIMPORT bool enable_partitionwise_aggregate; +extern PGDLLIMPORT bool enable_parallel_append; +extern PGDLLIMPORT bool enable_parallel_hash; +extern PGDLLIMPORT bool enable_partition_pruning; +extern PGDLLIMPORT int constraint_exclusion; + +extern double index_pages_fetched(double tuples_fetched, BlockNumber pages, + double index_pages, PlannerInfo *root); +extern void cost_seqscan(Path *path, PlannerInfo *root, RelOptInfo *baserel, + ParamPathInfo *param_info); +extern void cost_samplescan(Path *path, PlannerInfo *root, RelOptInfo *baserel, + ParamPathInfo *param_info); +extern void cost_index(IndexPath *path, PlannerInfo *root, + double loop_count, bool partial_path); +extern void cost_bitmap_heap_scan(Path *path, PlannerInfo *root, RelOptInfo *baserel, + ParamPathInfo *param_info, + Path *bitmapqual, double loop_count); +extern void cost_bitmap_and_node(BitmapAndPath *path, PlannerInfo *root); +extern void cost_bitmap_or_node(BitmapOrPath *path, PlannerInfo *root); +extern void cost_bitmap_tree_node(Path *path, Cost *cost, Selectivity *selec); +extern void cost_tidscan(Path *path, PlannerInfo *root, + RelOptInfo *baserel, List *tidquals, ParamPathInfo *param_info); +extern void cost_subqueryscan(SubqueryScanPath *path, PlannerInfo *root, + RelOptInfo *baserel, ParamPathInfo *param_info); +extern void cost_functionscan(Path *path, PlannerInfo *root, + RelOptInfo *baserel, ParamPathInfo *param_info); +extern void cost_valuesscan(Path *path, PlannerInfo *root, + RelOptInfo *baserel, ParamPathInfo *param_info); +extern void cost_tablefuncscan(Path *path, PlannerInfo *root, + RelOptInfo *baserel, ParamPathInfo *param_info); +extern void cost_ctescan(Path *path, PlannerInfo *root, + RelOptInfo *baserel, ParamPathInfo *param_info); +extern void cost_namedtuplestorescan(Path *path, PlannerInfo *root, + RelOptInfo *baserel, ParamPathInfo *param_info); +extern void cost_resultscan(Path *path, PlannerInfo *root, + RelOptInfo *baserel, ParamPathInfo *param_info); +extern void cost_recursive_union(Path *runion, Path *nrterm, Path *rterm); +extern void cost_sort(Path *path, PlannerInfo *root, + List *pathkeys, Cost input_cost, double tuples, int width, + Cost comparison_cost, int sort_mem, + double limit_tuples); +extern void cost_incremental_sort(Path *path, + PlannerInfo *root, List *pathkeys, int presorted_keys, + Cost input_startup_cost, Cost input_total_cost, + double input_tuples, int width, Cost comparison_cost, int sort_mem, + double limit_tuples); +extern void cost_append(AppendPath *path); +extern void cost_merge_append(Path *path, PlannerInfo *root, + List *pathkeys, int n_streams, + Cost input_startup_cost, Cost input_total_cost, + double tuples); +extern void cost_material(Path *path, + Cost input_startup_cost, Cost input_total_cost, + double tuples, int width); +extern void cost_agg(Path *path, PlannerInfo *root, + AggStrategy aggstrategy, const AggClauseCosts *aggcosts, + int numGroupCols, double numGroups, + List *quals, + Cost input_startup_cost, Cost input_total_cost, + double input_tuples, double input_width); +extern void cost_windowagg(Path *path, PlannerInfo *root, + List *windowFuncs, int numPartCols, int numOrderCols, + Cost input_startup_cost, Cost input_total_cost, + double input_tuples); +extern void cost_group(Path *path, PlannerInfo *root, + int numGroupCols, double numGroups, + List *quals, + Cost input_startup_cost, Cost input_total_cost, + double input_tuples); +extern void initial_cost_nestloop(PlannerInfo *root, + JoinCostWorkspace *workspace, + JoinType jointype, + Path *outer_path, Path *inner_path, + JoinPathExtraData *extra); +extern void final_cost_nestloop(PlannerInfo *root, NestPath *path, + JoinCostWorkspace *workspace, + JoinPathExtraData *extra); +extern void initial_cost_mergejoin(PlannerInfo *root, + JoinCostWorkspace *workspace, + JoinType jointype, + List *mergeclauses, + Path *outer_path, Path *inner_path, + List *outersortkeys, List *innersortkeys, + JoinPathExtraData *extra); +extern void final_cost_mergejoin(PlannerInfo *root, MergePath *path, + JoinCostWorkspace *workspace, + JoinPathExtraData *extra); +extern void initial_cost_hashjoin(PlannerInfo *root, + JoinCostWorkspace *workspace, + JoinType jointype, + List *hashclauses, + Path *outer_path, Path *inner_path, + JoinPathExtraData *extra, + bool parallel_hash); +extern void final_cost_hashjoin(PlannerInfo *root, HashPath *path, + JoinCostWorkspace *workspace, + JoinPathExtraData *extra); +extern void cost_gather(GatherPath *path, PlannerInfo *root, + RelOptInfo *baserel, ParamPathInfo *param_info, double *rows); +extern void cost_gather_merge(GatherMergePath *path, PlannerInfo *root, + RelOptInfo *rel, ParamPathInfo *param_info, + Cost input_startup_cost, Cost input_total_cost, + double *rows); +extern void cost_subplan(PlannerInfo *root, SubPlan *subplan, Plan *plan); +extern void cost_qual_eval(QualCost *cost, List *quals, PlannerInfo *root); +extern void cost_qual_eval_node(QualCost *cost, Node *qual, PlannerInfo *root); +extern void compute_semi_anti_join_factors(PlannerInfo *root, + RelOptInfo *joinrel, + RelOptInfo *outerrel, + RelOptInfo *innerrel, + JoinType jointype, + SpecialJoinInfo *sjinfo, + List *restrictlist, + SemiAntiJoinFactors *semifactors); +extern void set_baserel_size_estimates(PlannerInfo *root, RelOptInfo *rel); +extern double get_parameterized_baserel_size(PlannerInfo *root, + RelOptInfo *rel, + List *param_clauses); +extern double get_parameterized_joinrel_size(PlannerInfo *root, + RelOptInfo *rel, + Path *outer_path, + Path *inner_path, + SpecialJoinInfo *sjinfo, + List *restrict_clauses); +extern void set_joinrel_size_estimates(PlannerInfo *root, RelOptInfo *rel, + RelOptInfo *outer_rel, + RelOptInfo *inner_rel, + SpecialJoinInfo *sjinfo, + List *restrictlist); +extern void set_subquery_size_estimates(PlannerInfo *root, RelOptInfo *rel); +extern void set_function_size_estimates(PlannerInfo *root, RelOptInfo *rel); +extern void set_values_size_estimates(PlannerInfo *root, RelOptInfo *rel); +extern void set_cte_size_estimates(PlannerInfo *root, RelOptInfo *rel, + double cte_rows); +extern void set_tablefunc_size_estimates(PlannerInfo *root, RelOptInfo *rel); +extern void set_namedtuplestore_size_estimates(PlannerInfo *root, RelOptInfo *rel); +extern void set_result_size_estimates(PlannerInfo *root, RelOptInfo *rel); +extern void set_foreign_size_estimates(PlannerInfo *root, RelOptInfo *rel); +extern PathTarget *set_pathtarget_cost_width(PlannerInfo *root, PathTarget *target); +extern double compute_bitmap_pages(PlannerInfo *root, RelOptInfo *baserel, + Path *bitmapqual, int loop_count, Cost *cost, double *tuple); + +#endif /* COST_H */ |