1 /*-------------------------------------------------------------------------
2  *
3  * clauses.h
4  *	  prototypes for clauses.c.
5  *
6  *
7  * Portions Copyright (c) 1996-2021, 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 "nodes/pathnodes.h"
18 
19 typedef struct
20 {
21 	int			numWindowFuncs; /* total number of WindowFuncs found */
22 	Index		maxWinRef;		/* windowFuncs[] is indexed 0 .. maxWinRef */
23 	List	  **windowFuncs;	/* lists of WindowFuncs for each winref */
24 } WindowFuncLists;
25 
26 extern bool contain_agg_clause(Node *clause);
27 
28 extern bool contain_window_function(Node *clause);
29 extern WindowFuncLists *find_window_functions(Node *clause, Index maxWinRef);
30 
31 extern double expression_returns_set_rows(PlannerInfo *root, Node *clause);
32 
33 extern bool contain_subplans(Node *clause);
34 
35 extern char max_parallel_hazard(Query *parse);
36 extern bool is_parallel_safe(PlannerInfo *root, Node *node);
37 extern bool contain_nonstrict_functions(Node *clause);
38 extern bool contain_exec_param(Node *clause, List *param_ids);
39 extern bool contain_leaked_vars(Node *clause);
40 
41 extern Relids find_nonnullable_rels(Node *clause);
42 extern List *find_nonnullable_vars(Node *clause);
43 extern List *find_forced_null_vars(Node *clause);
44 extern Var *find_forced_null_var(Node *clause);
45 
46 extern bool is_pseudo_constant_clause(Node *clause);
47 extern bool is_pseudo_constant_clause_relids(Node *clause, Relids relids);
48 
49 extern int	NumRelids(PlannerInfo *root, Node *clause);
50 
51 extern void CommuteOpExpr(OpExpr *clause);
52 
53 extern Query *inline_set_returning_function(PlannerInfo *root,
54 											RangeTblEntry *rte);
55 
56 #endif							/* CLAUSES_H */
57