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Improved EXPLAIN option handling.

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This commit is contained in:
Bruce Momjian 1996-12-29 00:53:20 +00:00
parent e981bcb0c3
commit 4415e481ef
1 changed files with 16 additions and 6 deletions
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22
src/backend/commands/explain.c
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@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/explain.c,v 1.5 1996/12/03 05:50:11 vadim Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/explain.c,v 1.6 1996/12/29 00:53:20 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -43,7 +43,7 @@ static char *Explain_PlanToString(Plan *plan, ExplainState *es);
void
ExplainQuery(Query *query, List *options, CommandDest dest)
{
char *s;
char *s = NULL, *s2;
Plan *plan;
ExplainState *es;
int len;
@ -69,21 +69,31 @@ ExplainQuery(Query *query, List *options, CommandDest dest)
memset(es, 0, sizeof(ExplainState));
/* parse options */
es->printCost = 1; /* default */
while (options) {
char *ostr = strVal(lfirst(options));
if (!strcasecmp(ostr, "cost"))
es->printCost = 1;
else if (!strcasecmp(ostr, "full_plan"))
else if (!strcasecmp(ostr, "full"))
es->printNodes = 1;
else
elog(WARN, "Unknown EXPLAIN option: %s", ostr);
options = lnext(options);
}
es->rtable = query->rtable;
if (es->printNodes) {
if (es->printNodes)
s = nodeToString(plan);
} else {
s = Explain_PlanToString(plan, es);
if (es->printCost) {
s2 = Explain_PlanToString(plan, es);
if (s == NULL)
s = s2;
else {
strcat(s, "\n\n");
strcat(s, s2);
}
}
/* output the plan */