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Clean up plantree representation of SubPlan-s --- SubLink does not appear
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.
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@ -5,7 +5,7 @@
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* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994-5, Regents of the University of California
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*
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* $Header: /cvsroot/pgsql/src/backend/commands/explain.c,v 1.97 2002/12/13 19:45:49 tgl Exp $
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* $Header: /cvsroot/pgsql/src/backend/commands/explain.c,v 1.98 2002/12/14 00:17:50 tgl Exp $
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*
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*/
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@ -589,8 +589,8 @@ explain_outNode(StringInfo str,
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appendStringInfo(str, " InitPlan\n");
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foreach(lst, planstate->initPlan)
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{
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SubPlanExprState *sps = (SubPlanExprState *) lfirst(lst);
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SubPlanExpr *sp = (SubPlanExpr *) sps->xprstate.expr;
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SubPlanState *sps = (SubPlanState *) lfirst(lst);
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SubPlan *sp = (SubPlan *) sps->xprstate.expr;
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es->rtable = sp->rtable;
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for (i = 0; i < indent; i++)
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@ -687,8 +687,8 @@ explain_outNode(StringInfo str,
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appendStringInfo(str, " SubPlan\n");
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foreach(lst, planstate->subPlan)
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{
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SubPlanExprState *sps = (SubPlanExprState *) lfirst(lst);
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SubPlanExpr *sp = (SubPlanExpr *) sps->xprstate.expr;
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SubPlanState *sps = (SubPlanState *) lfirst(lst);
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SubPlan *sp = (SubPlan *) sps->xprstate.expr;
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es->rtable = sp->rtable;
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for (i = 0; i < indent; i++)
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