SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 2)
    Function CAST (children 1)
     ExpressionList (children 2)
      Literal \'123456789\'
      Literal \'Decimal(9,0)\'
    Function CAST (children 1)
     ExpressionList (children 2)
      Literal \'123456789123456789\'
      Literal \'Decimal(18,0)\'