SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function greater (children 1)
     ExpressionList (children 2)
      Function toDateTime (children 1)
       ExpressionList (children 1)
        Literal \'1991-01-02\'
      Function toDate32 (children 1)
       ExpressionList (children 1)
        Literal \'1990-02-01\'