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 0558ea34b054db356ff081abc0b10d7bb2b0186d..18c74525fa02fc940d6529df5adaa59573545728 100644 (file)
--- a/src/backend/tcop/utility.c
+++ b/src/backend/tcop/utility.c
@@ -2452,6 +2452,9 @@ GetCommandLogLevel(Node *parsetree)
 {
        LogStmtLevel lev;
 
+       if (parsetree == NULL)
+               return LOGSTMT_ALL;
+
        switch (nodeTag(parsetree))
        {
                        /* raw plannable queries */