(Intro) We current have 5.5 (from the debian package percona-xtradb-cluster) running, in two x three-node galera clusters. Which is all good.
We decided to upgrade to 5.6, both to get those improvements and galera 3.
However, looking at the change notes (http://dev.mysql.com/doc/refman/5.6/en/upgrading-from-previous-series.html) it show incompatible changes for DATE and releated types. And the instructions to fix this include editing the frm file in hex mode. This seems not only dangerous to me, but a bit, well, mad.
So I was wondering if there was another workaround. If I did a mysqldump/re-import (not really practical, I have rather a lot of data) would that work? Or convert the databases to MyISAM, upgrade the servers, and convert back to InnoDB?
I’d rather not write a script to go across all my databases (and all the tables therein) and monkey with the frm files in hex mode.
Are there issues with the upgrade? Given it isn’t backwardly compatible, I’d rather make sure this will work before I do it. I’ve googled around, but nothing seems to imply it is fundementally broken. But the instructions in the ‘upgrading release notes’ worry me. Given the low-level nature of the fix, I am surprised I haven’t seen more info/posts about it. Maybe everyone is just ignoring it…
Everything else in the release notes are fine.