1 /*-------------------------------------------------------------------------
4 * prototypes for clauses.c.
7 * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
8 * Portions Copyright (c) 1994, Regents of the University of California
10 * src/include/optimizer/clauses.h
12 *-------------------------------------------------------------------------
17 #include "access/htup.h"
18 #include "nodes/relation.h"
20 #define is_opclause(clause) ((clause) != NULL && IsA(clause, OpExpr))
21 #define is_funcclause(clause) ((clause) != NULL && IsA(clause, FuncExpr))
25 int numWindowFuncs; /* total number of WindowFuncs found */
26 Index maxWinRef; /* windowFuncs[] is indexed 0 .. maxWinRef */
27 List **windowFuncs; /* lists of WindowFuncs for each winref */
30 extern Expr *make_opclause(Oid opno, Oid opresulttype, bool opretset,
31 Expr *leftop, Expr *rightop,
32 Oid opcollid, Oid inputcollid);
33 extern Node *get_leftop(const Expr *clause);
34 extern Node *get_rightop(const Expr *clause);
36 extern bool not_clause(Node *clause);
37 extern Expr *make_notclause(Expr *notclause);
38 extern Expr *get_notclausearg(Expr *notclause);
40 extern bool or_clause(Node *clause);
41 extern Expr *make_orclause(List *orclauses);
43 extern bool and_clause(Node *clause);
44 extern Expr *make_andclause(List *andclauses);
45 extern Node *make_and_qual(Node *qual1, Node *qual2);
46 extern Expr *make_ands_explicit(List *andclauses);
47 extern List *make_ands_implicit(Expr *clause);
49 extern bool contain_agg_clause(Node *clause);
50 extern void get_agg_clause_costs(PlannerInfo *root, Node *clause,
51 AggSplit aggsplit, AggClauseCosts *costs);
53 extern bool contain_window_function(Node *clause);
54 extern WindowFuncLists *find_window_functions(Node *clause, Index maxWinRef);
56 extern double expression_returns_set_rows(Node *clause);
58 extern bool contain_subplans(Node *clause);
60 extern bool contain_mutable_functions(Node *clause);
61 extern bool contain_volatile_functions(Node *clause);
62 extern bool contain_volatile_functions_not_nextval(Node *clause);
63 extern char max_parallel_hazard(Query *parse);
64 extern bool is_parallel_safe(PlannerInfo *root, Node *node);
65 extern bool contain_nonstrict_functions(Node *clause);
66 extern bool contain_leaked_vars(Node *clause);
68 extern Relids find_nonnullable_rels(Node *clause);
69 extern List *find_nonnullable_vars(Node *clause);
70 extern List *find_forced_null_vars(Node *clause);
71 extern Var *find_forced_null_var(Node *clause);
73 extern bool is_pseudo_constant_clause(Node *clause);
74 extern bool is_pseudo_constant_clause_relids(Node *clause, Relids relids);
76 extern int NumRelids(Node *clause);
78 extern void CommuteOpExpr(OpExpr *clause);
79 extern void CommuteRowCompareExpr(RowCompareExpr *clause);
81 extern Node *eval_const_expressions(PlannerInfo *root, Node *node);
83 extern Node *estimate_expression_value(PlannerInfo *root, Node *node);
85 extern Expr *evaluate_expr(Expr *expr, Oid result_type, int32 result_typmod,
86 Oid result_collation);
88 extern Query *inline_set_returning_function(PlannerInfo *root,
91 extern List *expand_function_arguments(List *args, Oid result_type,
92 HeapTuple func_tuple);
94 #endif /* CLAUSES_H */