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 c76e7bb0fecdacb75bfc02a0dfb4bbb56ffbafca..81e832506afd8b87b7f613343c9c0b5801cc3ed7 100644 (file)
--- a/src/backend/tcop/utility.c
+++ b/src/backend/tcop/utility.c
@@ -2184,6 +2184,9 @@ GetCommandLogLevel(Node *parsetree)
 {
    LogStmtLevel lev;
 
+   if (parsetree == NULL)
+       return LOGSTMT_ALL;
+
    switch (nodeTag(parsetree))
    {
            /* raw plannable queries */