[Bug 1528583] Re: [FFe] Please update to MySQL 5.7 series

[Lars Tangvald]

I've redone the basic smoke testing for verifying just the package upgrades.
No issues were found during testing.

These tests do not include full Ubuntu release upgrades; They were only run on
16.04.

To include 5.5 I rebuilt it from the current 5.5.47 source in Debian. The 5.6
packages were used from the main Ubuntu repository, and the 5.7 packages were
installed from the ppa at
https://launchpad.net/~mysql-ubuntu/+archive/ubuntu/mysql-5.7

For each test I added minimal database data. One table with a couple of rows
and a test user with a password.

I ran through each test both with and without setting a password for the root
user.

For each test I verified that:

* mysql_upgrade was run successfully during installation (except for the clean
 install.
* If the root user had a password that the password was still valid
* If the root user had a blank password that the auth_socket plugin was enabled,
 requiring host system root access to log in with it.
* That the test user login was still valid
* That the test table data was intact

Upgrade paths tested:

* Fresh 5.7 install
* 5.7 installed on existing 5.7 database
* Fresh 5.6 install, upgraded to 5.7
* Fresh 5.5 install, upgraded to 5.7
* Fresh 5.5 install, upgraded to 5.6, then upgraded to 5.7
* Fresh 5.5 install, upgraded to 5.6, mysql_upgrade run, then upgraded to 5.7

We'll move on to more comprehensive upgrade testing including a full test
database and Ubuntu release upgrades.

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Title:
  [FFe] Please update to MySQL 5.7 series

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