CreateQuery invalid_tuple_null (children 3)
 Identifier invalid_tuple_null
 Columns definition (children 1)
  ExpressionList (children 1)
   ColumnDeclaration id (children 1)
    DataType Tuple (children 1)
     ExpressionList (children 2)
      DataType Nullable (children 1)
       ExpressionList (children 1)
        DataType String
      DataType UInt8
 Storage definition (children 2)
  Function MergeTree
  Identifier id
