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Support for subselects.

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This commit is contained in:
Vadim B. Mikheev 1998-02-13 03:21:30 +00:00
parent 33c2da9725
commit 13637df458
1 changed files with 47 additions and 5 deletions
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52
src/backend/commands/explain.c
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@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/explain.c,v 1.16 1997/12/29 05:13:22 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/explain.c,v 1.17 1998/02/13 03:21:30 vadim Exp $
*
*-------------------------------------------------------------------------
*/
@ -176,8 +176,10 @@ explain_outNode(StringInfo str, Plan *plan, int indent, ExplainState *es)
break;
}
#if 0
for (i = 0; i < indent; i++)
appendStringInfo(str, " ");
#endif
appendStringInfo(str, pname);
switch (nodeTag(plan))
@ -202,14 +204,34 @@ explain_outNode(StringInfo str, Plan *plan, int indent, ExplainState *es)
appendStringInfo(str, buf);
}
appendStringInfo(str, "\n");
/* initPlan-s */
if (plan->initPlan)
{
List *saved_rtable = es->rtable;
List *lst;
for (i = 0; i < indent; i++)
appendStringInfo(str, " ");
appendStringInfo(str, " InitPlan\n");
foreach (lst, plan->initPlan)
{
es->rtable = ((SubPlan*) lfirst(lst))->rtable;
for (i = 0; i < indent; i++)
appendStringInfo(str, " ");
appendStringInfo(str, " -> ");
explain_outNode(str, ((SubPlan*) lfirst(lst))->plan, indent + 4, es);
}
es->rtable = saved_rtable;
}
/* lefttree */
if (outerPlan(plan))
{
for (i = 0; i < indent; i++)
appendStringInfo(str, " ");
appendStringInfo(str, " -> ");
explain_outNode(str, outerPlan(plan), indent + 1, es);
appendStringInfo(str, " -> ");
explain_outNode(str, outerPlan(plan), indent + 3, es);
}
/* righttree */
@ -217,8 +239,28 @@ explain_outNode(StringInfo str, Plan *plan, int indent, ExplainState *es)
{
for (i = 0; i < indent; i++)
appendStringInfo(str, " ");
appendStringInfo(str, " -> ");
explain_outNode(str, innerPlan(plan), indent + 1, es);
appendStringInfo(str, " -> ");
explain_outNode(str, innerPlan(plan), indent + 3, es);
}
/* subPlan-s */
if (plan->subPlan)
{
List *saved_rtable = es->rtable;
List *lst;
for (i = 0; i < indent; i++)
appendStringInfo(str, " ");
appendStringInfo(str, " SubPlan\n");
foreach (lst, plan->subPlan)
{
es->rtable = ((SubPlan*) lfirst(lst))->rtable;
for (i = 0; i < indent; i++)
appendStringInfo(str, " ");
appendStringInfo(str, " -> ");
explain_outNode(str, ((SubPlan*) lfirst(lst))->plan, indent + 4, es);
}
es->rtable = saved_rtable;
}
return;
}