SelectWithUnionQuery (children 3)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 2)
    Function untuple (alias x) (children 1)
     ExpressionList (children 1)
      Function CAST (children 1)
       ExpressionList (children 2)
        Function tuple (children 1)
         ExpressionList (children 1)
          Literal UInt64_1
        Literal \'Tuple(Int)\'
    Function untuple (alias y) (children 1)
     ExpressionList (children 1)
      Function CAST (children 1)
       ExpressionList (children 2)
        Function tuple (children 1)
         ExpressionList (children 1)
          Literal \'s\'
        Literal \'Tuple(String)\'
 Identifier Vertical
 Set
