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- /*-------------------------------------------------------------------------
- *
- * clauses.h
- * prototypes for clauses.c.
- *
- *
- * Portions Copyright (c) 1996-2016, PostgreSQL Global Development Group
- * Portions Copyright (c) 1994, Regents of the University of California
- *
- * src/include/optimizer/clauses.h
- *
- *-------------------------------------------------------------------------
- */
- #ifndef CLAUSES_H
- #define CLAUSES_H
- #include "nodes/relation.h"
- #define is_opclause(clause) ((clause) != NULL && IsA(clause, OpExpr))
- #define is_funcclause(clause) ((clause) != NULL && IsA(clause, FuncExpr))
- typedef struct
- {
- int numWindowFuncs; /* total number of WindowFuncs found */
- Index maxWinRef; /* windowFuncs[] is indexed 0 .. maxWinRef */
- List **windowFuncs; /* lists of WindowFuncs for each winref */
- } WindowFuncLists;
- extern Expr *make_opclause(Oid opno, Oid opresulttype, bool opretset,
- Expr *leftop, Expr *rightop,
- Oid opcollid, Oid inputcollid);
- extern Node *get_leftop(const Expr *clause);
- extern Node *get_rightop(const Expr *clause);
- extern bool not_clause(Node *clause);
- extern Expr *make_notclause(Expr *notclause);
- extern Expr *get_notclausearg(Expr *notclause);
- extern bool or_clause(Node *clause);
- extern Expr *make_orclause(List *orclauses);
- extern bool and_clause(Node *clause);
- extern Expr *make_andclause(List *andclauses);
- extern Node *make_and_qual(Node *qual1, Node *qual2);
- extern Expr *make_ands_explicit(List *andclauses);
- extern List *make_ands_implicit(Expr *clause);
- extern bool contain_agg_clause(Node *clause);
- extern void get_agg_clause_costs(PlannerInfo *root, Node *clause,
- AggSplit aggsplit, AggClauseCosts *costs);
- extern bool contain_window_function(Node *clause);
- extern WindowFuncLists *find_window_functions(Node *clause, Index maxWinRef);
- extern double expression_returns_set_rows(Node *clause);
- extern double tlist_returns_set_rows(List *tlist);
- extern bool contain_subplans(Node *clause);
- extern bool contain_mutable_functions(Node *clause);
- extern bool contain_volatile_functions(Node *clause);
- extern bool contain_volatile_functions_not_nextval(Node *clause);
- extern bool has_parallel_hazard(Node *node, bool allow_restricted);
- extern bool contain_nonstrict_functions(Node *clause);
- extern bool contain_leaked_vars(Node *clause);
- extern Relids find_nonnullable_rels(Node *clause);
- extern List *find_nonnullable_vars(Node *clause);
- extern List *find_forced_null_vars(Node *clause);
- extern Var *find_forced_null_var(Node *clause);
- extern bool is_pseudo_constant_clause(Node *clause);
- extern bool is_pseudo_constant_clause_relids(Node *clause, Relids relids);
- extern int NumRelids(Node *clause);
- extern void CommuteOpExpr(OpExpr *clause);
- extern void CommuteRowCompareExpr(RowCompareExpr *clause);
- extern Node *eval_const_expressions(PlannerInfo *root, Node *node);
- extern Node *estimate_expression_value(PlannerInfo *root, Node *node);
- extern Query *inline_set_returning_function(PlannerInfo *root,
- RangeTblEntry *rte);
- #endif /* CLAUSES_H */
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