src/include/optimizer/restrictinfo.h

   1 /*-------------------------------------------------------------------------
   2  *
   3  * restrictinfo.h
   4  *        prototypes for restrictinfo.c.
   5  *
   6  *
   7  * Portions Copyright (c) 1996-2004, PostgreSQL Global Development Group
   8  * Portions Copyright (c) 1994, Regents of the University of California
   9  *
  10  * $PostgreSQL: pgsql/src/include/optimizer/restrictinfo.h,v 1.24 2004/08/29 04:13:09 momjian Exp $
  11  *
  12  *-------------------------------------------------------------------------
  13  */
  14 #ifndef RESTRICTINFO_H
  15 #define RESTRICTINFO_H
  16
  17 #include "nodes/relation.h"
  18
  19 extern RestrictInfo *make_restrictinfo(Expr *clause, bool is_pushed_down,
  20                                                                            bool valid_everywhere);
  21 extern List *make_restrictinfo_from_indexclauses(List *indexclauses,
  22                                                                                                  bool is_pushed_down,
  23                                                                                                  bool valid_everywhere);
  24 extern bool restriction_is_or_clause(RestrictInfo *restrictinfo);
  25 extern List *get_actual_clauses(List *restrictinfo_list);
  26 extern void get_actual_join_clauses(List *restrictinfo_list,
  27                                                 List **joinquals, List **otherquals);
  28 extern List *remove_redundant_join_clauses(Query *root,
  29                                                           List *restrictinfo_list,
  30                                                           JoinType jointype);
  31 extern List *select_nonredundant_join_clauses(Query *root,
  32                                                                  List *restrictinfo_list,
  33                                                                  List *reference_list,
  34                                                                  JoinType jointype);
  35
  36 #endif   /* RESTRICTINFO_H */