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  1. MariaDB Server
  2. MDEV-24316

cross upgrade from MySQL - have precheck tool

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      MySQL has a check if its able to be upgrade before it does it. This is largely internal in the checks of the document/code:
      https://dev.mysql.com/doc/refman/8.0/en/mysqlcheck.html#option_mysqlcheck_check-upgrade
      https://dev.mysql.com/doc/refman/8.0/en/check-table.html#check-table-version-compatibility

      A similar test for example was suggested that we need to do in MariaDB. Given the large kb pages on incompatibilities I think this is something that can at least be partially automated in a check program.

      The goal is to advice users if an existing MySQL instance has any incompatibilities to note before a user tries to cross-upgrade to MariaDB.

      So the goal would be to check on a database/global scale looking at tables, at features used, at settings, at character sets in table and determine the migratablilty

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            Assignee:
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            Reporter:
            danblack Daniel Black
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