SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 2)
    Function CAST (children 1)
     ExpressionList (children 2)
      Function tuple (children 1)
       ExpressionList (children 3)
        Literal UInt64_1
        Literal \'Hello\'
        Function toDate (children 1)
         ExpressionList (children 1)
          Literal \'2016-01-01\'
      Literal \'String\'
    Function CAST (children 1)
     ExpressionList (children 2)
      Literal Array_[UInt64_1, UInt64_2, UInt64_3]
      Literal \'String\'
