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Phase 3 of read-only-plans project: ExecInitExpr now builds expression

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execution state trees, and ExecEvalExpr takes an expression state tree
not an expression plan tree.  The plan tree is now read-only as far as
the executor is concerned.  Next step is to begin actually exploiting
this property.
This commit is contained in:
Tom Lane
2002-12-13 19:46:01 +00:00
parent 77b7a740f9
commit 3a4f7dde16
49 changed files with 993 additions and 815 deletions
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20
src/backend/commands/explain.c
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@ -5,7 +5,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994-5, Regents of the University of California
*
* $Header: /cvsroot/pgsql/src/backend/commands/explain.c,v 1.96 2002/12/12 15:49:24 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/explain.c,v 1.97 2002/12/13 19:45:49 tgl Exp $
*
*/
@ -582,26 +582,24 @@ explain_outNode(StringInfo str,
if (plan->initPlan)
{
List *saved_rtable = es->rtable;
List *pslist = planstate->initPlan;
List *lst;
for (i = 0; i < indent; i++)
appendStringInfo(str, " ");
appendStringInfo(str, " InitPlan\n");
foreach(lst, plan->initPlan)
foreach(lst, planstate->initPlan)
{
SubPlanExpr *subplan = (SubPlanExpr *) lfirst(lst);
SubPlanState *subplanstate = (SubPlanState *) lfirst(pslist);
SubPlanExprState *sps = (SubPlanExprState *) lfirst(lst);
SubPlanExpr *sp = (SubPlanExpr *) sps->xprstate.expr;
es->rtable = subplan->rtable;
es->rtable = sp->rtable;
for (i = 0; i < indent; i++)
appendStringInfo(str, " ");
appendStringInfo(str, " -> ");
explain_outNode(str, subplan->plan,
subplanstate->planstate,
explain_outNode(str, sp->plan,
sps->planstate,
NULL,
indent + 4, es);
pslist = lnext(pslist);
}
es->rtable = saved_rtable;
}
@ -689,8 +687,8 @@ explain_outNode(StringInfo str,
appendStringInfo(str, " SubPlan\n");
foreach(lst, planstate->subPlan)
{
SubPlanState *sps = (SubPlanState *) lfirst(lst);
SubPlanExpr *sp = (SubPlanExpr *) sps->ps.plan;
SubPlanExprState *sps = (SubPlanExprState *) lfirst(lst);
SubPlanExpr *sp = (SubPlanExpr *) sps->xprstate.expr;
es->rtable = sp->rtable;
for (i = 0; i < indent; i++)