SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 2)
    Function CAST (alias t) (children 1)
     ExpressionList (children 2)
      Literal Tuple_(\'hello\', UInt64_1)
      Literal \'Tuple(hello String, count UInt32)\'
    Identifier t.hello
