Hi all, Le 20/03/2014 13:20, Christophe a écrit : > Hi Morgan, Harald, and all, > > Thanks for the answers. > > While reading your answers, I realize one more time this problem does > not seem so obvious ... That's why I asked ;) . > > Beyond the specific case I mentioned, my goal is also to get a general > discussion about theorical behaviour of MySQL while handling WHERE clauses. > > I don't have access to the application for now, but will try EXPLAIN as > soon as I can .
Here is the Result of Explain : http://perso.stux6.net/mysql/20140323/EXPLAIN.txt I don't really know what is tells in details, but according to "key" field, it seems the IDX_CS_DWProcessed key is processed first, as I'd like it to be ... Other question : is an INDEX on DATETIME field really useful ? Regards, Christophe. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql
