----- Original Message ----- > From: "mos" <mo...@fastmail.fm> > > The IN() clause is very inefficient because MySQL will NOT use the > index. > It will have to traverse the entire table looking for these values.
Has that still not been remedied ? > It will get the information from the index and not have to access the > record data from disk. If the index is stored in memory, then it > won't have to go to disk (unless you also have a sort). That is why the query > cache is so important. Indices don't go in the query cache, strictly speaking, they go in the MyISAM index cache or in the InnoDB pool. -- Bier met grenadyn Is als mosterd by den wyn Sy die't drinkt, is eene kwezel Hy die't drinkt, is ras een ezel -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql?unsub=arch...@jab.org
