MySQL不支持 full outer join，如何做全连接

[SQL]select user.name, filesource.filename from user full outer join filesource on user.id = filesource.id order by user.name;
[Err] 1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'outer join filesource on user.id = filesource.id order by user.name' at line 1

select user.name,filesource.filename from user left join filesource on user.id = filesource.id union select user.name,filesource.filename from user right join filesource on user.id=filesource.id;