Fix segmentation fault that an empty prepared statement could cause.

MasaoFujii · MasaoFujii · commit a73c9dbab016 · 2014-09-05T02:17:57.000+09:00
Back-patch to all supported branches.

Per bug #11335 from Haruka Takatsuka
diff --git a/src/backend/tcop/utility.c b/src/backend/tcop/utility.c
@@ -2461,6 +2461,9 @@ GetCommandLogLevel(Node *parsetree)
 {
 	LogStmtLevel lev;
 
+	if (parsetree == NULL)
+		return LOGSTMT_ALL;
+
 	switch (nodeTag(parsetree))
 	{
 			/* raw plannable queries */

Original file line number	Diff line number	Diff line change
`@@ -2461,6 +2461,9 @@ GetCommandLogLevel(Node *parsetree)`
`2461`	`2461`	`{`
`2462`	`2462`	`LogStmtLevel lev;`
`2463`	`2463`
	`2464`	`+ if (parsetree == NULL)`
	`2465`	`+ return LOGSTMT_ALL;`
	`2466`	`+`
`2464`	`2467`	`switch (nodeTag(parsetree))`
`2465`	`2468`	`{`
`2466`	`2469`	`/* raw plannable queries */`