diff options
Diffstat (limited to 'src/include/optimizer/clauses.h')
| -rw-r--r-- | src/include/optimizer/clauses.h | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/src/include/optimizer/clauses.h b/src/include/optimizer/clauses.h index 78605c20c9..3cd74b1e25 100644 --- a/src/include/optimizer/clauses.h +++ b/src/include/optimizer/clauses.h @@ -6,7 +6,7 @@ * * Copyright (c) 1994, Regents of the University of California * - * $Id: clauses.h,v 1.18 1999/05/25 22:43:03 momjian Exp $ + * $Id: clauses.h,v 1.19 1999/06/19 03:41:44 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -17,6 +17,7 @@ #include <nodes/relation.h> extern Expr *make_clause(int type, Node *oper, List *args); + extern bool is_opclause(Node *clause); extern Expr *make_opclause(Oper *op, Var *leftop, Var *rightop); extern Var *get_leftop(Expr *clause); @@ -51,8 +52,11 @@ extern void get_rels_atts(Node *clause, int *relid1, AttrNumber *attno1, int *relid2, AttrNumber *attno2); extern void CommuteClause(Node *clause); -#define is_subplan(clause) ((Node*) clause != NULL && \ - nodeTag((Node*) clause) == T_Expr && \ - ((Expr *) clause)->opType == SUBPLAN_EXPR) +extern bool expression_tree_walker(Node *node, bool (*walker) (), + void *context); + +#define is_subplan(clause) ((Node*) (clause) != NULL && \ + nodeTag((Node*) (clause)) == T_Expr && \ + ((Expr *) (clause))->opType == SUBPLAN_EXPR) #endif /* CLAUSES_H */ |