diff --git a/src/client/src/tscSQLParser.c b/src/client/src/tscSQLParser.c
index 9e8e780af7441529a6c99ffb56a934dd26f95c05..b2c1a594a13d446022c7fd469fb422887108d106 100644
--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -1885,6 +1885,7 @@ int32_t addExprAndResultField(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, int32_t col
   const char* msg7 = "normal table can not apply this function";
   const char* msg8 = "multi-columns selection does not support alias column name";
   const char* msg9 = "invalid function";
+  const char* msg10 = "diff can no be applied to unsigned numeric type";
 
   switch (optr) {
     case TK_COUNT: {