message: Add test code for null case
  Fix review comment
diff: @@ -39,6 +39,15 @@ test_case!(trim, async move {
  "SELECT TRIM(a => 2) FROM Item;",
  Err(TranslateError::NamedFunctionArgNotSupported.into()),
  ),
  + (
  + "CREATE TABLE NullName (name TEXT NULL)",
  + Ok(Payload::Create),
  + ),
  + ("INSERT INTO NullName VALUES (NULL)", Ok(Payload::Insert(1))),
  + (
  + "SELECT TRIM(name) AS test FROM NullName;",
  + Ok(select_with_null!(test; Value::Null)),
  + ),
  ];
  for (sql, expected) in test_cases {
  