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Re: MySQL 5.5 EOL before Debian 8 LTS ends

On Tue, Jan 23, 2018 at 11:41:57AM +0100, Lars Tangvald wrote:
> I can't find much of anything that has changed from 5.5 to 5.6 in terms of
> default behavior, except for NO_ENGINE_SUBSTITUTION being the default
> sql_mode (https://dev.mysql.com/doc/refman/5.6/en/sql-mode.html#sqlmode_no_engine_substitution).
> I'll do some more digging, but I don't think there should be much impact on
> reverse-dependencies.
> Some options were removed
> https://dev.mysql.com/doc/refman/5.6/en/server-options.html (often renamed).
> We did see quite a few regressions of that type for users upgrading from 5.5
> to 5.7, but almost all were because the default 5.5 config in Ubuntu
> packaging contained options that were removed in 5.7.

That sounds far too disruptive for an LTS; better declare announce the server
part of mysql (where all the vulnerabilities apply) as unsupported in advance
and in December change the package to only build the libmysqlclient parts.
The client library part is usually not affected by any security issues and
that way you don't risk any regressions.

People then have a year to migrate their servers to jessie (or ideally
update/reimage to stretch)


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