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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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12
src/backend/optimizer/plan/setrefs.c
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@ -9,7 +9,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/plan/setrefs.c,v 1.85 2002/12/12 15:49:32 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/plan/setrefs.c,v 1.86 2002/12/14 00:17:55 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -219,7 +219,7 @@ set_plan_references(Plan *plan, List *rtable)
* subplan references in this plan's tlist and quals. If we did the
* reference-adjustments bottom-up, then we would fail to match this
* plan's var nodes against the already-modified nodes of the
* children. Fortunately, that consideration doesn't apply to SubPlanExpr
* children. Fortunately, that consideration doesn't apply to SubPlan
* nodes; else we'd need two passes over the expression trees.
*/
set_plan_references(plan->lefttree, rtable);
@ -227,9 +227,9 @@ set_plan_references(Plan *plan, List *rtable)
foreach(pl, plan->initPlan)
{
SubPlanExpr *sp = (SubPlanExpr *) lfirst(pl);
SubPlan *sp = (SubPlan *) lfirst(pl);
Assert(IsA(sp, SubPlanExpr));
Assert(IsA(sp, SubPlan));
set_plan_references(sp->plan, sp->rtable);
}
}
@ -259,9 +259,9 @@ fix_expr_references_walker(Node *node, void *context)
set_opfuncid((OpExpr *) node);
else if (IsA(node, DistinctExpr))
set_opfuncid((OpExpr *) node); /* rely on struct equivalence */
else if (IsA(node, SubPlanExpr))
else if (IsA(node, SubPlan))
{
SubPlanExpr *sp = (SubPlanExpr *) node;
SubPlan *sp = (SubPlan *) node;
set_plan_references(sp->plan, sp->rtable);
}