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* Portions Copyright (c) 1996-2000, PostgreSQL, Inc to all files copyright Regents of Berkeley. Man, that's a lot of files.
69 lines
2.2 KiB
C
69 lines
2.2 KiB
C
/*-------------------------------------------------------------------------
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*
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* clauses.h
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* prototypes for clauses.c.
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*
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*
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* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $Id: clauses.h,v 1.33 2000/01/26 05:58:20 momjian Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef CLAUSES_H
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#define CLAUSES_H
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#include "nodes/relation.h"
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extern Expr *make_clause(int type, Node *oper, List *args);
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extern bool is_opclause(Node *clause);
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extern Expr *make_opclause(Oper *op, Var *leftop, Var *rightop);
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extern Var *get_leftop(Expr *clause);
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extern Var *get_rightop(Expr *clause);
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extern bool is_funcclause(Node *clause);
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extern Expr *make_funcclause(Func *func, List *funcargs);
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extern bool or_clause(Node *clause);
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extern Expr *make_orclause(List *orclauses);
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extern bool not_clause(Node *clause);
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extern Expr *make_notclause(Expr *notclause);
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extern Expr *get_notclausearg(Expr *notclause);
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extern bool and_clause(Node *clause);
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extern Expr *make_andclause(List *andclauses);
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extern Expr *make_ands_explicit(List *andclauses);
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extern List *make_ands_implicit(Expr *clause);
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extern List *pull_constant_clauses(List *quals, List **constantQual);
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extern bool contain_agg_clause(Node *clause);
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extern List *pull_agg_clause(Node *clause);
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extern void check_subplans_for_ungrouped_vars(Node *clause,
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Query *query,
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List *targetList);
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extern void clause_get_relids_vars(Node *clause, Relids *relids, List **vars);
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extern int NumRelids(Node *clause);
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extern void get_relattval(Node *clause, int targetrelid,
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int *relid, AttrNumber *attno,
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Datum *constval, int *flag);
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extern void get_rels_atts(Node *clause, int *relid1,
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AttrNumber *attno1, int *relid2, AttrNumber *attno2);
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extern void CommuteClause(Expr *clause);
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extern Node *eval_const_expressions(Node *node);
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extern bool expression_tree_walker(Node *node, bool (*walker) (),
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void *context);
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extern Node *expression_tree_mutator(Node *node, Node * (*mutator) (),
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void *context);
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#define is_subplan(clause) ((clause) != NULL && \
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IsA(clause, Expr) && \
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((Expr *) (clause))->opType == SUBPLAN_EXPR)
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#endif /* CLAUSES_H */
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