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Further tweaks to support display of sort keys in EXPLAIN --- initial

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implementation didn't work for Sort nodes associated with Append plans.
This commit is contained in:
Tom Lane
2002-06-13 03:40:49 +00:00
parent 59c325bb73
commit ecb5269404
3 changed files with 39 additions and 34 deletions
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35
src/backend/commands/explain.c
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@ -5,7 +5,7 @@
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994-5, Regents of the University of California
*
* $Header: /cvsroot/pgsql/src/backend/commands/explain.c,v 1.78 2002/05/18 21:38:40 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/explain.c,v 1.79 2002/06/13 03:40:49 tgl Exp $
*
*/
@ -681,7 +681,8 @@ show_scan_qual(List *qual, bool is_or_qual, const char *qlabel,
outercontext = NULL;
context = deparse_context_for_plan(scanrelid, scancontext,
OUTER, outercontext);
OUTER, outercontext,
NIL);
/* Deparse the expression */
exprstr = deparse_expression(node, context, (outercontext != NULL));
@ -726,7 +727,8 @@ show_upper_qual(List *qual, const char *qlabel,
else
innercontext = NULL;
context = deparse_context_for_plan(outer_varno, outercontext,
inner_varno, innercontext);
inner_varno, innercontext,
NIL);
/* Deparse the expression */
node = (Node *) make_ands_explicit(qual);
@ -761,11 +763,30 @@ show_sort_keys(List *tlist, int nkeys, const char *qlabel,
/*
* In this routine we expect that the plan node's tlist has not been
* processed by set_plan_references(), so any Vars will contain valid
* varnos referencing the actual rtable.
* processed by set_plan_references(). Normally, any Vars will contain
* valid varnos referencing the actual rtable. But we might instead be
* looking at a dummy tlist generated by prepunion.c; if there are
* Vars with zero varno, use the tlist itself to determine their names.
*/
context = deparse_context_from_rtable(es->rtable);
useprefix = length(es->rtable) > 1;
if (intMember(0, pull_varnos((Node *) tlist)))
{
Node *outercontext;
outercontext = deparse_context_for_subplan("sort",
tlist,
es->rtable);
context = deparse_context_for_plan(0, outercontext,
0, NULL,
NIL);
useprefix = false;
}
else
{
context = deparse_context_for_plan(0, NULL,
0, NULL,
es->rtable);
useprefix = length(es->rtable) > 1;
}
for (keyno = 1; keyno <= nkeys; keyno++)
{