In MySQL 5.0 why does the following error occur when trying to create a view with a subquery in the FROM clause?
ERROR 1349 (HY000): View's SELECT contains a subquery in the FROM clause
If this is a limitation of the MySQL engine, then why haven't they implemented this feature yet?
Also, what are some good workarounds for this limitation?
Are there any workarounds that work for any subquery in the FROM clause or are there some queries that can not be expressed without using a subquery in the FROM clause?
An example query (was buried in a comment):
SELECT temp.UserName FROM (SELECT u1.name as UserName, COUNT(m1.UserFromId) as SentCount FROM Message m1, User u1 WHERE u1.uid = m1.UserFromId Group BY u1.name HAVING SentCount > 3 ) as temp