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/*-------------------------------------------------------------------------
*
* 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 */
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