mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-10-02 05:01:18 +02:00
44d5be0e53
There are some unimplemented aspects: recursive queries must use UNION ALL (should allow UNION too), and we don't have SEARCH or CYCLE clauses. These might or might not get done for 8.4, but even without them it's a pretty useful feature. There are also a couple of small loose ends and definitional quibbles, which I'll send a memo about to pgsql-hackers shortly. But let's land the patch now so we can get on with other development. Yoshiyuki Asaba, with lots of help from Tatsuo Ishii and Tom Lane
59 lines
2.1 KiB
C
59 lines
2.1 KiB
C
/*-------------------------------------------------------------------------
|
|
*
|
|
* 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 1.29 2008/10/04 21:56:55 tgl Exp $
|
|
*
|
|
*-------------------------------------------------------------------------
|
|
*/
|
|
#ifndef NODEFUNCS_H
|
|
#define NODEFUNCS_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_CTE_SUBQUERIES 0x02 /* subqueries in cteList */
|
|
#define QTW_IGNORE_RC_SUBQUERIES 0x03 /* both of above */
|
|
#define QTW_IGNORE_JOINALIASES 0x04 /* JOIN alias var lists */
|
|
#define QTW_EXAMINE_RTES 0x08 /* examine RTEs */
|
|
#define QTW_DONT_COPY_QUERY 0x10 /* 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 int exprLocation(Node *expr);
|
|
|
|
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 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);
|
|
|
|
extern bool raw_expression_tree_walker(Node *node, bool (*walker) (),
|
|
void *context);
|
|
|
|
#endif /* NODEFUNCS_H */
|