SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function mapAdd (children 1)
     ExpressionList (children 2)
      Function map (children 1)
       ExpressionList (children 4)
        Literal \'Hello\'
        Function CAST (children 1)
         ExpressionList (children 2)
          Literal \'1.2\'
          Literal \'Decimal128(30)\'
        Literal \'World\'
        Function CAST (children 1)
         ExpressionList (children 2)
          Literal \'3.4\'
          Literal \'Decimal128(30)\'
      Function map (children 1)
       ExpressionList (children 4)
        Literal \'World\'
        Function CAST (children 1)
         ExpressionList (children 2)
          Literal \'5.6\'
          Literal \'Decimal128(30)\'
        Literal \'GoodBye\'
        Function CAST (children 1)
         ExpressionList (children 2)
          Literal \'-111.222\'
          Literal \'Decimal128(30)\'
