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e6381966c1
store all ordering information in pathkeys lists (which are now lists of lists of PathKeyItem nodes, not just lists of lists of vars). This was a big win --- the code is smaller and IMHO more understandable than it was, even though it handles more cases. I believe the node changes will not force an initdb for anyone; planner nodes don't show up in stored rules.
56 lines
1.7 KiB
C
56 lines
1.7 KiB
C
/*-------------------------------------------------------------------------
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*
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* pathnode.h
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* prototypes for pathnode.c, indexnode.c, relnode.c.
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*
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*
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* Copyright (c) 1994, Regents of the University of California
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*
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* $Id: pathnode.h,v 1.21 1999/08/16 02:17:45 tgl Exp $
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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 bool path_is_cheaper(Path *path1, Path *path2);
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extern Path *set_cheapest(RelOptInfo *parent_rel, List *pathlist);
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extern List *add_pathlist(RelOptInfo *parent_rel, List *old_paths,
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List *new_paths);
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extern Path *create_seqscan_path(RelOptInfo *rel);
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extern IndexPath *create_index_path(Query *root, RelOptInfo *rel,
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RelOptInfo *index, List *restriction_clauses);
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extern NestPath *create_nestloop_path(RelOptInfo *joinrel,
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RelOptInfo *outer_rel, Path *outer_path, Path *inner_path,
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List *pathkeys);
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extern MergePath *create_mergejoin_path(RelOptInfo *joinrel, int outersize,
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int innersize, int outerwidth, int innerwidth, Path *outer_path,
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Path *inner_path, List *pathkeys,
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List *mergeclauses, List *outersortkeys, List *innersortkeys);
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extern HashPath *create_hashjoin_path(RelOptInfo *joinrel, int outersize,
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int innersize, int outerwidth, int innerwidth, Path *outer_path,
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Path *inner_path, List *hashclauses, Cost innerdisbursion);
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/*
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* prototypes for rel.c
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*/
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extern RelOptInfo *rel_member(Relids relid, List *rels);
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extern RelOptInfo *get_base_rel(Query *root, int relid);
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extern RelOptInfo *get_join_rel(Query *root, Relids relid);
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/*
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* prototypes for indexnode.h
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*/
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extern List *find_relation_indices(Query *root, RelOptInfo *rel);
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#endif /* PATHNODE_H */
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