Hi! On Dec 05, Tobias Crush wrote: > Hi All, > > We am currently investigating the possiblity of migrating a legacy app from > Informix C-ISAM files to MySQL. To do this we are looking to be able to > retain the core application code as unchanged as possible. > > What we want to do is be able to develop a new front end that accesses the > data through the normal MySQL channels AND use the existing legacy > application code to access the datafiles directly as they currently do. > > Has anyone attempted to run a MySQL database with updates occuring through a > front end accessing the database through the regular database managment > engine and direct file updates happening from legacy code in the background? > Is it possible. > > Thanks for your help. > > Tobias Crush > Senior Consultant > Partnership Technology Group
It is possible. Exactly for this task we developed a HANDLER command. MySQL translates it directly into low-level ISAM commands. It looks like this: HANDLER table OPEN HANDLER table READ NEXT|PREV|FIRST|LAST|key=.... HANDLER table CLOSE This way you can directly translate your c-isam calls into HANDLER commands. This command is available in 4.0.0 If you have a support contract we can backport this feature to 3.23 with a customized patch. Regards, Sergei -- MySQL Development Team __ ___ ___ ____ __ / |/ /_ __/ __/ __ \/ / Sergei Golubchik <[EMAIL PROTECTED]> / /|_/ / // /\ \/ /_/ / /__ MySQL AB, http://www.mysql.com/ /_/ /_/\_, /___/\___\_\___/ Osnabrueck, Germany <___/ --------------------------------------------------------------------- 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
