http://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=7872 --- Comment #13 from Paul Poulain <paul.poulain@biblibre.com> --- (In reply to comment #10)
(In reply to comment #6)
(In reply to comment #5)
LIMIT 1 is not needed since adding framework to WHERE always returns single row and it's more correct.
Why more correct ? I don't understand. For me, LIMIT 1 should be used if we want only a unique row. I think it can increase performance (I agree with you, it is negligible).
Actually a where on an indexed column is a lot faster than using limit, explain is a good tool for looking at the query plan to see how mysql is optimising the query. There is a whole project of sql optimisation we could do by checking some of our more used queries.
Site comment: investigating DBI, we've found that all handlers are automatically closed when a query has returned all results. If plan not to fetch all results, then you must explicitely close $sth, or you may have some useless memory consumption -- You are receiving this mail because: You are watching all bug changes.