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 1740ff9f0abef727f8ffdc922dd8f81d56ef61f3..5acfa31b30126c05483f990a801a606a55ee8922 100644 (file)
--- a/src/backend/tcop/utility.c
+++ b/src/backend/tcop/utility.c
@@ -2262,6 +2262,9 @@ GetCommandLogLevel(Node *parsetree)
 {
        LogStmtLevel lev;
 
+       if (parsetree == NULL)
+               return LOGSTMT_ALL;
+
        switch (nodeTag(parsetree))
        {
                        /* raw plannable queries */