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Bug#860970: release-notes: MariaDB vs MySQL section 2.2.3 needs clarifying on how to perform the upgrade

Hi Paul
If I understand correctly, you are suggesting this change:

  MariaDB is now the default MySQL variant in Debian, at version 10.1.
  The Stretch release introduces a new mechanism for switching the
  default variant, using metapackages created from the
  mysql-defaults source package.
  For example, installing the metapackage
  default-mysql-server will install
- Users who had
+ For upgrading from jessie, it is recommended to install
+ this metapackage from the jessie-backports archive so that
+ users who have
  mysql-server-5.5 or mysql-server-5.6 will have it
  removed and replaced by the MariaDB equivalent.
  Similarly, installing default-mysql-client will install

I don't think the release team want upgrades to depend on backports,
so I don't that's a viable option here.

But let's go back a step - you're saying that
if:   you have a jessie system with mysql-server-5.x
      and you dist-upgrade,
      without explicitly installing default-mysql-server
then: mysql-server-5.x gets uninstalled
      and no mariadb-server-* package gets installed ?

If correct, that's a big problem.

What the text is trying to tell people to do is to dist-upgrade,
then install default-mysql-server. That second action should
initiate the uninstall of mysql-server-5.x and then install
mariadb-server-10.1. Is that what you took from the text?
If not, can you think of a way to make it clearer?


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