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00001 /*------------------------------------------------------------------------- 00002 * 00003 * clauses.h 00004 * prototypes for clauses.c. 00005 * 00006 * 00007 * Portions Copyright (c) 1996-2013, PostgreSQL Global Development Group 00008 * Portions Copyright (c) 1994, Regents of the University of California 00009 * 00010 * src/include/optimizer/clauses.h 00011 * 00012 *------------------------------------------------------------------------- 00013 */ 00014 #ifndef CLAUSES_H 00015 #define CLAUSES_H 00016 00017 #include "nodes/relation.h" 00018 00019 00020 #define is_opclause(clause) ((clause) != NULL && IsA(clause, OpExpr)) 00021 #define is_funcclause(clause) ((clause) != NULL && IsA(clause, FuncExpr)) 00022 00023 typedef struct 00024 { 00025 int numWindowFuncs; /* total number of WindowFuncs found */ 00026 Index maxWinRef; /* windowFuncs[] is indexed 0 .. maxWinRef */ 00027 List **windowFuncs; /* lists of WindowFuncs for each winref */ 00028 } WindowFuncLists; 00029 00030 00031 extern Expr *make_opclause(Oid opno, Oid opresulttype, bool opretset, 00032 Expr *leftop, Expr *rightop, 00033 Oid opcollid, Oid inputcollid); 00034 extern Node *get_leftop(const Expr *clause); 00035 extern Node *get_rightop(const Expr *clause); 00036 00037 extern bool not_clause(Node *clause); 00038 extern Expr *make_notclause(Expr *notclause); 00039 extern Expr *get_notclausearg(Expr *notclause); 00040 00041 extern bool or_clause(Node *clause); 00042 extern Expr *make_orclause(List *orclauses); 00043 00044 extern bool and_clause(Node *clause); 00045 extern Expr *make_andclause(List *andclauses); 00046 extern Node *make_and_qual(Node *qual1, Node *qual2); 00047 extern Expr *make_ands_explicit(List *andclauses); 00048 extern List *make_ands_implicit(Expr *clause); 00049 00050 extern bool contain_agg_clause(Node *clause); 00051 extern void count_agg_clauses(PlannerInfo *root, Node *clause, 00052 AggClauseCosts *costs); 00053 00054 extern bool contain_window_function(Node *clause); 00055 extern WindowFuncLists *find_window_functions(Node *clause, Index maxWinRef); 00056 00057 extern double expression_returns_set_rows(Node *clause); 00058 extern double tlist_returns_set_rows(List *tlist); 00059 00060 extern bool contain_subplans(Node *clause); 00061 00062 extern bool contain_mutable_functions(Node *clause); 00063 extern bool contain_volatile_functions(Node *clause); 00064 extern bool contain_nonstrict_functions(Node *clause); 00065 extern bool contain_leaky_functions(Node *clause); 00066 00067 extern Relids find_nonnullable_rels(Node *clause); 00068 extern List *find_nonnullable_vars(Node *clause); 00069 extern List *find_forced_null_vars(Node *clause); 00070 extern Var *find_forced_null_var(Node *clause); 00071 00072 extern bool is_pseudo_constant_clause(Node *clause); 00073 extern bool is_pseudo_constant_clause_relids(Node *clause, Relids relids); 00074 00075 extern int NumRelids(Node *clause); 00076 00077 extern void CommuteOpExpr(OpExpr *clause); 00078 extern void CommuteRowCompareExpr(RowCompareExpr *clause); 00079 00080 extern Node *strip_implicit_coercions(Node *node); 00081 00082 extern Node *eval_const_expressions(PlannerInfo *root, Node *node); 00083 00084 extern Node *estimate_expression_value(PlannerInfo *root, Node *node); 00085 00086 extern Query *inline_set_returning_function(PlannerInfo *root, 00087 RangeTblEntry *rte); 00088 00089 #endif /* CLAUSES_H */
1.7.1