At 15:29 +0200 4/19/02, Toomas Vendelin wrote: >Hello Paul, > >But RLIKE won't use indexes (even if they exist), so why RLIKE '^A' is >better than LIKE 'A%', if LIKE which starts at the beginning of the >string **will** use indexes?
I was comparing RLIKE '^A.*' to RLIKE '^A', not RLIKE to LIKE. > >Regards, > >Tom > >PD> Regular expression patterns (unlike SQL patterns) don't need to match the >PD> entire string, so RLIKE '^A' is sufficient and more efficient because >PD> it doesn't spend time trying to match anything other than the first >PD> character. > >PD> As to the original question (below), that query looks like it should >PD> work. Perhaps the problem lies elsewhere in the code that executes >PD> the query. (It may be the query gets modified somehow. Without seeing >PD> the context, it's hard to say.) --------------------------------------------------------------------- Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail <[EMAIL PROTECTED]> To unsubscribe, e-mail <[EMAIL PROTECTED]> Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
