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Adjust API of expression_tree_mutator and query_tree_mutator to

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simplify callers.  It turns out the common case is that the caller
does want to recurse into sub-queries, so push support for that into
these subroutines.
This commit is contained in:
Tom Lane
2003-01-17 02:01:21 +00:00
parent 227a404cf4
commit a4d82dd4b4
8 changed files with 167 additions and 220 deletions
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16
src/backend/optimizer/prep/prepunion.c
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@ -14,7 +14,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/prep/prepunion.c,v 1.86 2003/01/15 19:35:44 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/prep/prepunion.c,v 1.87 2003/01/17 02:01:16 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -34,11 +34,6 @@
#include "parser/parsetree.h"
#include "utils/lsyscache.h"
/* macros borrowed from expression_tree_mutator */
#define FLATCOPY(newnode, node, nodetype) \
( (newnode) = makeNode(nodetype), \
memcpy((newnode), (node), sizeof(nodetype)) )
typedef struct
{
@ -765,12 +760,12 @@ adjust_inherited_attrs(Node *node,
*/
if (node && IsA(node, Query))
{
Query *query = (Query *) node;
Query *newnode;
FLATCOPY(newnode, query, Query);
query_tree_mutator(newnode, adjust_inherited_attrs_mutator,
(void *) &context, QTW_IGNORE_SUBQUERIES);
newnode = query_tree_mutator((Query *) node,
adjust_inherited_attrs_mutator,
(void *) &context,
QTW_IGNORE_RT_SUBQUERIES);
if (newnode->resultRelation == old_rt_index)
{
newnode->resultRelation = new_rt_index;
@ -899,6 +894,7 @@ adjust_inherited_attrs_mutator(Node *node,
* already have been converted to subplans before we see them.
*/
Assert(!IsA(node, SubLink));
Assert(!IsA(node, Query));
/*
* BUT: although we don't need to recurse into subplans, we do need to