Line data    Source code

       1              : /*-------------------------------------------------------------------------
       2              :  *
       3              :  * restrictinfo.h
       4              :  *    prototypes for restrictinfo.c.
       5              :  *
       6              :  *
       7              :  * Portions Copyright (c) 1996-2026, PostgreSQL Global Development Group
       8              :  * Portions Copyright (c) 1994, Regents of the University of California
       9              :  *
      10              :  * src/include/optimizer/restrictinfo.h
      11              :  *
      12              :  *-------------------------------------------------------------------------
      13              :  */
      14              : #ifndef RESTRICTINFO_H
      15              : #define RESTRICTINFO_H
      16              : 
      17              : #include "nodes/pathnodes.h"
      18              : 
      19              : 
      20              : /* Convenience macro for the common case of a valid-everywhere qual */
      21              : #define make_simple_restrictinfo(root, clause)  \
      22              :     make_restrictinfo(root, clause, true, false, false, false, 0, \
      23              :         NULL, NULL, NULL)
      24              : 
      25              : extern RestrictInfo *make_plain_restrictinfo(PlannerInfo *root,
      26              :                                              Expr *clause,
      27              :                                              Expr *orclause,
      28              :                                              bool is_pushed_down,
      29              :                                              bool has_clone,
      30              :                                              bool is_clone,
      31              :                                              bool pseudoconstant,
      32              :                                              Index security_level,
      33              :                                              Relids required_relids,
      34              :                                              Relids incompatible_relids,
      35              :                                              Relids outer_relids);
      36              : extern RestrictInfo *make_restrictinfo(PlannerInfo *root,
      37              :                                        Expr *clause,
      38              :                                        bool is_pushed_down,
      39              :                                        bool has_clone,
      40              :                                        bool is_clone,
      41              :                                        bool pseudoconstant,
      42              :                                        Index security_level,
      43              :                                        Relids required_relids,
      44              :                                        Relids incompatible_relids,
      45              :                                        Relids outer_relids);
      46              : extern RestrictInfo *commute_restrictinfo(RestrictInfo *rinfo, Oid comm_op);
      47              : extern bool restriction_is_or_clause(RestrictInfo *restrictinfo);
      48              : extern bool restriction_is_securely_promotable(RestrictInfo *restrictinfo,
      49              :                                                RelOptInfo *rel);
      50              : extern List *get_actual_clauses(List *restrictinfo_list);
      51              : extern List *extract_actual_clauses(List *restrictinfo_list,
      52              :                                     bool pseudoconstant);
      53              : extern void extract_actual_join_clauses(List *restrictinfo_list,
      54              :                                         Relids joinrelids,
      55              :                                         List **joinquals,
      56              :                                         List **otherquals);
      57              : extern bool join_clause_is_movable_to(RestrictInfo *rinfo, RelOptInfo *baserel);
      58              : extern bool join_clause_is_movable_into(RestrictInfo *rinfo,
      59              :                                         Relids currentrelids,
      60              :                                         Relids current_and_outer);
      61              : 
      62              : /*
      63              :  * clause_sides_match_join
      64              :  *    Determine whether a join clause is of the right form to use in this join.
      65              :  *
      66              :  * We already know that the clause is a binary opclause referencing only the
      67              :  * rels in the current join.  The point here is to check whether it has the
      68              :  * form "outerrel_expr op innerrel_expr" or "innerrel_expr op outerrel_expr",
      69              :  * rather than mixing outer and inner vars on either side.  If it matches,
      70              :  * we set the transient flag outer_is_left to identify which side is which.
      71              :  */
      72              : static inline bool
      73      1190503 : clause_sides_match_join(RestrictInfo *rinfo, Relids outerrelids,
      74              :                         Relids innerrelids)
      75              : {
      76      1781158 :     if (bms_is_subset(rinfo->left_relids, outerrelids) &&
      77       590655 :         bms_is_subset(rinfo->right_relids, innerrelids))
      78              :     {
      79              :         /* lefthand side is outer */
      80       590423 :         rinfo->outer_is_left = true;
      81       590423 :         return true;
      82              :     }
      83      1188641 :     else if (bms_is_subset(rinfo->left_relids, innerrelids) &&
      84       588561 :              bms_is_subset(rinfo->right_relids, outerrelids))
      85              :     {
      86              :         /* righthand side is outer */
      87       563764 :         rinfo->outer_is_left = false;
      88       563764 :         return true;
      89              :     }
      90        36316 :     return false;               /* no good for these input relations */
      91              : }
      92              : 
      93              : #endif                          /* RESTRICTINFO_H */