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Clean up plantree representation of SubPlan-s --- SubLink does not appear

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in the planned representation of a subplan at all any more, only SubPlan.
This means subselect.c doesn't scribble on its input anymore, which seems
like a good thing; and there are no longer three different possible
interpretations of a SubLink.  Simplify node naming and improve comments
in primnodes.h.  No change to stored rules, though.
This commit is contained in:
Tom Lane
2002-12-14 00:17:59 +00:00
parent 29cdab3d53
commit 2d8d66628a
24 changed files with 355 additions and 356 deletions
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6
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 1.82 2002/12/12 15:49:32 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/prep/prepunion.c,v 1.83 2002/12/14 00:17:57 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -872,13 +872,13 @@ adjust_inherited_attrs_mutator(Node *node,
*/
if (is_subplan(node))
{
SubPlanExpr *subplan;
SubPlan *subplan;
/* Copy the node and process subplan args */
node = expression_tree_mutator(node, adjust_inherited_attrs_mutator,
(void *) context);
/* Make sure we have separate copies of subplan and its rtable */
subplan = (SubPlanExpr *) node;
subplan = (SubPlan *) node;
subplan->plan = copyObject(subplan->plan);
subplan->rtable = copyObject(subplan->rtable);
return node;