diff options
Diffstat (limited to 'src/include/nodes/nodeFuncs.h')
| -rw-r--r-- | src/include/nodes/nodeFuncs.h | 41 |
1 files changed, 34 insertions, 7 deletions
diff --git a/src/include/nodes/nodeFuncs.h b/src/include/nodes/nodeFuncs.h index 375301a0dcd..f699fc1b68e 100644 --- a/src/include/nodes/nodeFuncs.h +++ b/src/include/nodes/nodeFuncs.h @@ -1,23 +1,50 @@ /*------------------------------------------------------------------------- * * nodeFuncs.h - * - * + * Various general-purpose manipulations of Node trees * * Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/include/nodes/nodeFuncs.h,v 1.26 2008/01/01 19:45:58 momjian Exp $ + * $PostgreSQL: pgsql/src/include/nodes/nodeFuncs.h,v 1.27 2008/08/25 22:42:34 tgl Exp $ * *------------------------------------------------------------------------- */ #ifndef NODEFUNCS_H #define NODEFUNCS_H -#include "nodes/primnodes.h" +#include "nodes/parsenodes.h" + + +/* flags bits for query_tree_walker and query_tree_mutator */ +#define QTW_IGNORE_RT_SUBQUERIES 0x01 /* subqueries in rtable */ +#define QTW_IGNORE_JOINALIASES 0x02 /* JOIN alias var lists */ +#define QTW_DONT_COPY_QUERY 0x04 /* do not copy top Query */ + + +extern Oid exprType(Node *expr); +extern int32 exprTypmod(Node *expr); +extern bool exprIsLengthCoercion(Node *expr, int32 *coercedTypmod); +extern bool expression_returns_set(Node *clause); + +extern bool expression_tree_walker(Node *node, bool (*walker) (), + void *context); +extern Node *expression_tree_mutator(Node *node, Node *(*mutator) (), + void *context); + +extern bool query_tree_walker(Query *query, bool (*walker) (), + void *context, int flags); +extern Query *query_tree_mutator(Query *query, Node *(*mutator) (), + void *context, int flags); + +extern bool range_table_walker(List *rtable, bool (*walker) (), + void *context, int flags); +extern List *range_table_mutator(List *rtable, Node *(*mutator) (), + void *context, int flags); -extern bool single_node(Node *node); -extern bool var_is_outer(Var *var); -extern bool var_is_rel(Var *var); +extern bool query_or_expression_tree_walker(Node *node, bool (*walker) (), + void *context, int flags); +extern Node *query_or_expression_tree_mutator(Node *node, Node *(*mutator) (), + void *context, int flags); #endif /* NODEFUNCS_H */ |