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https://github.com/postgres/postgres.git
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Tom Lane
d583f10b7e
This is a heavily revised version of builtin_knngist_core-0.9. The ordering operators are no longer mixed in with actual quals, which would have confused not only humans but significant parts of the planner. Instead, ordering operators are carried separately throughout planning and execution. Since the API for ambeginscan and amrescan functions had to be changed anyway, this commit takes the opportunity to rationalize that a bit. RelationGetIndexScan no longer forces a premature index_rescan call; instead, callers of index_beginscan must call index_rescan too. Aside from making the AM-side initialization logic a bit less peculiar, this has the advantage that we do not make a useless extra am_rescan call when there are runtime key values. AMs formerly could not assume that the key values passed to amrescan were actually valid; now they can. Teodor Sigaev and Tom Lane
110 lines
3.6 KiB
C
110 lines
3.6 KiB
C
/*-------------------------------------------------------------------------
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*
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* pathnode.h
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* prototypes for pathnode.c, relnode.c.
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*
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*
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* Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* src/include/optimizer/pathnode.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef PATHNODE_H
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#define PATHNODE_H
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#include "nodes/relation.h"
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/*
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* prototypes for pathnode.c
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*/
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extern int compare_path_costs(Path *path1, Path *path2,
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CostSelector criterion);
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extern int compare_fractional_path_costs(Path *path1, Path *path2,
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double fraction);
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extern void set_cheapest(RelOptInfo *parent_rel);
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extern void add_path(RelOptInfo *parent_rel, Path *new_path);
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extern Path *create_seqscan_path(PlannerInfo *root, RelOptInfo *rel);
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extern IndexPath *create_index_path(PlannerInfo *root,
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IndexOptInfo *index,
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List *clause_groups,
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List *indexorderbys,
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List *pathkeys,
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ScanDirection indexscandir,
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RelOptInfo *outer_rel);
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extern BitmapHeapPath *create_bitmap_heap_path(PlannerInfo *root,
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RelOptInfo *rel,
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Path *bitmapqual,
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RelOptInfo *outer_rel);
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extern BitmapAndPath *create_bitmap_and_path(PlannerInfo *root,
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RelOptInfo *rel,
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List *bitmapquals);
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extern BitmapOrPath *create_bitmap_or_path(PlannerInfo *root,
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RelOptInfo *rel,
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List *bitmapquals);
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extern TidPath *create_tidscan_path(PlannerInfo *root, RelOptInfo *rel,
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List *tidquals);
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extern AppendPath *create_append_path(RelOptInfo *rel, List *subpaths);
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extern MergeAppendPath *create_merge_append_path(PlannerInfo *root,
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RelOptInfo *rel,
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List *subpaths,
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List *pathkeys);
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extern ResultPath *create_result_path(List *quals);
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extern MaterialPath *create_material_path(RelOptInfo *rel, Path *subpath);
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extern UniquePath *create_unique_path(PlannerInfo *root, RelOptInfo *rel,
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Path *subpath, SpecialJoinInfo *sjinfo);
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extern Path *create_subqueryscan_path(RelOptInfo *rel, List *pathkeys);
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extern Path *create_functionscan_path(PlannerInfo *root, RelOptInfo *rel);
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extern Path *create_valuesscan_path(PlannerInfo *root, RelOptInfo *rel);
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extern Path *create_ctescan_path(PlannerInfo *root, RelOptInfo *rel);
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extern Path *create_worktablescan_path(PlannerInfo *root, RelOptInfo *rel);
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extern NestPath *create_nestloop_path(PlannerInfo *root,
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RelOptInfo *joinrel,
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JoinType jointype,
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SpecialJoinInfo *sjinfo,
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Path *outer_path,
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Path *inner_path,
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List *restrict_clauses,
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List *pathkeys);
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extern MergePath *create_mergejoin_path(PlannerInfo *root,
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RelOptInfo *joinrel,
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JoinType jointype,
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SpecialJoinInfo *sjinfo,
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Path *outer_path,
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Path *inner_path,
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List *restrict_clauses,
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List *pathkeys,
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List *mergeclauses,
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List *outersortkeys,
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List *innersortkeys);
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extern HashPath *create_hashjoin_path(PlannerInfo *root,
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RelOptInfo *joinrel,
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JoinType jointype,
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SpecialJoinInfo *sjinfo,
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Path *outer_path,
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Path *inner_path,
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List *restrict_clauses,
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List *hashclauses);
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/*
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* prototypes for relnode.c
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*/
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extern RelOptInfo *build_simple_rel(PlannerInfo *root, int relid,
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RelOptKind reloptkind);
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extern RelOptInfo *find_base_rel(PlannerInfo *root, int relid);
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extern RelOptInfo *find_join_rel(PlannerInfo *root, Relids relids);
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extern RelOptInfo *build_join_rel(PlannerInfo *root,
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Relids joinrelids,
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RelOptInfo *outer_rel,
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RelOptInfo *inner_rel,
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SpecialJoinInfo *sjinfo,
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List **restrictlist_ptr);
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#endif /* PATHNODE_H */
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