1 /*------------------------------------------------------------------------- 2 * 3 * clauses.h 4 * prototypes for clauses.c. 5 * 6 * 7 * Portions Copyright (c) 1996-2018, 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/relation.h" 19 20 #define is_opclause(clause) ((clause) != NULL && IsA(clause, OpExpr)) 21 #define is_funcclause(clause) ((clause) != NULL && IsA(clause, FuncExpr)) 22 23 typedef struct 24 { 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 */ 28 } WindowFuncLists; 29 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); 35 36 extern bool not_clause(Node *clause); 37 extern Expr *make_notclause(Expr *notclause); 38 extern Expr *get_notclausearg(Expr *notclause); 39 40 extern bool or_clause(Node *clause); 41 extern Expr *make_orclause(List *orclauses); 42 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); 48 49 extern bool contain_agg_clause(Node *clause); 50 extern void get_agg_clause_costs(PlannerInfo *root, Node *clause, 51 AggSplit aggsplit, AggClauseCosts *costs); 52 53 extern bool contain_window_function(Node *clause); 54 extern WindowFuncLists *find_window_functions(Node *clause, Index maxWinRef); 55 56 extern double expression_returns_set_rows(Node *clause); 57 58 extern bool contain_subplans(Node *clause); 59 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_exec_param(Node *clause, List *param_ids); 67 extern bool contain_leaked_vars(Node *clause); 68 69 extern Relids find_nonnullable_rels(Node *clause); 70 extern List *find_nonnullable_vars(Node *clause); 71 extern List *find_forced_null_vars(Node *clause); 72 extern Var *find_forced_null_var(Node *clause); 73 74 extern bool is_pseudo_constant_clause(Node *clause); 75 extern bool is_pseudo_constant_clause_relids(Node *clause, Relids relids); 76 77 extern int NumRelids(Node *clause); 78 79 extern void CommuteOpExpr(OpExpr *clause); 80 extern void CommuteRowCompareExpr(RowCompareExpr *clause); 81 82 extern Node *eval_const_expressions(PlannerInfo *root, Node *node); 83 84 extern Node *estimate_expression_value(PlannerInfo *root, Node *node); 85 86 extern Query *inline_set_returning_function(PlannerInfo *root, 87 RangeTblEntry *rte); 88 89 extern List *expand_function_arguments(List *args, Oid result_type, 90 HeapTuple func_tuple); 91 92 #endif /* CLAUSES_H */ 93