SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function toDecimalString (children 1)
     ExpressionList (children 2)
      Function CAST (children 1)
       ExpressionList (children 2)
        Literal \'128.789323123321329854641231237893231233213298546\'
        Literal \'Decimal256(45)\'
      Literal UInt64_10
