SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function arrayDifference (children 1)
     ExpressionList (children 1)
      Function array (children 1)
       ExpressionList (children 2)
        Function CAST (children 1)
         ExpressionList (children 2)
          Literal \'1.2\'
          Literal \'Decimal(60, 30)\'
        Function CAST (children 1)
         ExpressionList (children 2)
          Literal \'3.45\'
          Literal \'Decimal(61, 29)\'
