Spring Security Oracle sql Question (incompatible column index)

List<String> type =getJdbcTemplate().query( SQL , new String[] {id, id}, new RowMapper<String>() {

SELECT  USER_TYPE
FROM (
    SELECT 
        'user' as USER_TYPE
    FROM
        TABLE_USER
    WHERE 
        USER_ID=?
    UNION
    SELECT
        'admin' AS USER_TYPE
    FROM
        TABLE_ADMIN
    WHERE
        ADMIN_ID=?
)