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/*------------------------------------------------------------------------- * * clauses.h * prototypes for clauses.c. * * * Portions Copyright (c) 1996-2012, 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 count_agg_clauses(PlannerInfo *root, Node *clause, 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_nonstrict_functions(Node *clause); extern bool contain_leaky_functions(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 *strip_implicit_coercions(Node *node); 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 */