1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
|
/*-------------------------------------------------------------------------
*
* pathnode.h
* prototypes for pathnode.c, relnode.c.
*
*
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: pathnode.h,v 1.35 2001/03/22 04:00:54 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef PATHNODE_H
#define PATHNODE_H
#include "nodes/relation.h"
/*
* prototypes for pathnode.c
*/
extern int compare_path_costs(Path *path1, Path *path2,
CostSelector criterion);
extern int compare_fractional_path_costs(Path *path1, Path *path2,
double fraction);
extern void set_cheapest(RelOptInfo *parent_rel);
extern void add_path(RelOptInfo *parent_rel, Path *new_path);
extern Path *create_seqscan_path(RelOptInfo *rel);
extern IndexPath *create_index_path(Query *root, RelOptInfo *rel,
IndexOptInfo *index,
List *restriction_clauses,
List *pathkeys,
ScanDirection indexscandir);
extern TidPath *create_tidscan_path(RelOptInfo *rel, List *tideval);
extern AppendPath *create_append_path(RelOptInfo *rel, List *subpaths);
extern Path *create_subqueryscan_path(RelOptInfo *rel);
extern NestPath *create_nestloop_path(RelOptInfo *joinrel,
JoinType jointype,
Path *outer_path,
Path *inner_path,
List *restrict_clauses,
List *pathkeys);
extern MergePath *create_mergejoin_path(RelOptInfo *joinrel,
JoinType jointype,
Path *outer_path,
Path *inner_path,
List *restrict_clauses,
List *pathkeys,
List *mergeclauses,
List *outersortkeys,
List *innersortkeys);
extern HashPath *create_hashjoin_path(RelOptInfo *joinrel,
JoinType jointype,
Path *outer_path,
Path *inner_path,
List *restrict_clauses,
List *hashclauses,
Selectivity innerdispersion);
/*
* prototypes for relnode.c
*/
extern RelOptInfo *get_base_rel(Query *root, int relid);
extern RelOptInfo *make_base_rel(Query *root, int relid);
extern RelOptInfo *get_join_rel(Query *root,
RelOptInfo *outer_rel,
RelOptInfo *inner_rel,
JoinType jointype,
List **restrictlist_ptr);
#endif /* PATHNODE_H */
|
