I had perfectly working complex queries both with LEFT JOIN and without
and they were returning results in under a second. After upgrade to
5.0.x, the same queries would return results in 20-30 second range.

Through trial and error, I discovered that in case of SELECT ... FROM
table1, table2 ... ORDER BY table2.column will be very slow (10s of
seconds), while the same query ordered by table1.column will be in under
1 second. If I switch the order of tables in FROM, the same will hold
true in reverse order. Is this a bug or I missed something in my
googling? More importantly, what can I do change this--I need those
sorts! :-(

I got same results with 5.0.22, 5.0.27 (Linux).


TIA,

Ed


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