This functionality will search for <a href="http://tracker.moodle.org/browse/MDL-29322">Oracle varchar2 columns using BYTE semantics</a> in your Moodle server, generating (but not executing!) automatically the needed SQL statements to have all the columns converted to use CHAR semantics instead (better for cross-db compatibility and increased contents max. length).

Once generated you can copy such statements and execute them safely with your favourite SQL interface (don't forget to backup your data before doing that).

It's highly recommended to be running the latest (+ version) available of your Moodle release before executing the search of BYTE semantics.

This functionality doesn't perform any action against the DB (just reads from it), so can be safely executed at any moment.