1 /*-------------------------------------------------------------------------
2  *
3  * clauses.h
4  *	  prototypes for clauses.c.
5  *
6  *
7  * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
8  * Portions Copyright (c) 1994, Regents of the University of California
9  *
10  * src/include/optimizer/clauses.h
11  *
12  *-------------------------------------------------------------------------
13  */
14 #ifndef CLAUSES_H
15 #define CLAUSES_H
16 
17 #include "access/htup.h"
18 #include "nodes/pathnodes.h"
19 
20 typedef struct
21 {
22 	int			numWindowFuncs; /* total number of WindowFuncs found */
23 	Index		maxWinRef;		/* windowFuncs[] is indexed 0 .. maxWinRef */
24 	List	  **windowFuncs;	/* lists of WindowFuncs for each winref */
25 } WindowFuncLists;
26 
27 extern bool contain_agg_clause(Node *clause);
28 extern void get_agg_clause_costs(PlannerInfo *root, Node *clause,
29 								 AggSplit aggsplit, AggClauseCosts *costs);
30 
31 extern bool contain_window_function(Node *clause);
32 extern WindowFuncLists *find_window_functions(Node *clause, Index maxWinRef);
33 
34 extern double expression_returns_set_rows(PlannerInfo *root, Node *clause);
35 
36 extern bool contain_subplans(Node *clause);
37 
38 extern char max_parallel_hazard(Query *parse);
39 extern bool is_parallel_safe(PlannerInfo *root, Node *node);
40 extern bool contain_nonstrict_functions(Node *clause);
41 extern bool contain_exec_param(Node *clause, List *param_ids);
42 extern bool contain_leaked_vars(Node *clause);
43 
44 extern Relids find_nonnullable_rels(Node *clause);
45 extern List *find_nonnullable_vars(Node *clause);
46 extern List *find_forced_null_vars(Node *clause);
47 extern Var *find_forced_null_var(Node *clause);
48 
49 extern bool is_pseudo_constant_clause(Node *clause);
50 extern bool is_pseudo_constant_clause_relids(Node *clause, Relids relids);
51 
52 extern int	NumRelids(Node *clause);
53 extern int	NumRelids_new(PlannerInfo *root, Node *clause);
54 
55 extern void CommuteOpExpr(OpExpr *clause);
56 
57 extern Query *inline_set_returning_function(PlannerInfo *root,
58 											RangeTblEntry *rte);
59 
60 #endif							/* CLAUSES_H */
61