Michael Widenius's Blog

September 23, 2010

Making upgrades from MySQL 5.0 easier

The intention from the start was to make upgrades to newer MySQL versions trivial. We have done a lot of work to keep data formats compatible (both in the .frm files and in the storage engines); when you install a new version of MySQL things should "just work". For a long time this was true, until MySQL 5.0 where we had to do some data incompatible changes, like in the way some characters were sorted and how end-of-line blanks were stored in indexes.

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