Fix segmentation fault that an empty prepared statement could cause.

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
index c900c85d81de3eedb88039adf50c92a1cca913a2..b83a7eaac900f188ceb910366f6f9ecadaea4888 100644 (file)
--- a/src/backend/tcop/utility.c
+++ b/src/backend/tcop/utility.c
@@ -2429,6 +2429,9 @@ GetCommandLogLevel(Node *parsetree)
 {
    LogStmtLevel lev;
 
+   if (parsetree == NULL)
+       return LOGSTMT_ALL;
+
    switch (nodeTag(parsetree))
    {
            /* raw plannable queries */