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Move exprType(), exprTypmod(), expression_tree_walker(), and related routines

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into nodes/nodeFuncs, so as to reduce wanton cross-subsystem #includes inside
the backend.  There's probably more that should be done along this line,
but this is a start anyway.
This commit is contained in:
Tom Lane
2008-08-25 22:42:34 +00:00
parent d320101b5b
commit e5536e77a5
55 changed files with 1865 additions and 1910 deletions
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41
src/include/nodes/nodeFuncs.h
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@@ -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"
extern bool single_node(Node *node);
extern bool var_is_outer(Var *var);
extern bool var_is_rel(Var *var);
/* 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 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 */