Dave Dyer <[EMAIL PROTECTED]> wrote: > Before I post it as a bug, perhaps someone can explain why > this query is not optimized to use the index (it has to examine all 287k rows). > > mysql> explain SELECT MAX(changed) FROM archived_stats where changed>0; > | table | type | possible_keys | key | key_len | ref | rows | > Extra | > | archived_stats | range | changed | changed | 4 | NULL | 2878820 | > Using where; Using index |
There are 2.878k rows, not 287k. And it's optimized as much as possible, the key is used. -- For technical support contracts, goto https://order.mysql.com/?ref=ensita This email is sponsored by Ensita.net http://www.ensita.net/ __ ___ ___ ____ __ / |/ /_ __/ __/ __ \/ / Egor Egorov / /|_/ / // /\ \/ /_/ / /__ [EMAIL PROTECTED] /_/ /_/\_, /___/\___\_\___/ MySQL AB / Ensita.net <___/ www.mysql.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
