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Hi Radoslaw.

I have a doubt, https://review.opendev.org/#/c/677221 "op.alter_column('subnets','network_id', nullable=False, existing_type=sa.String(36))" altered ' network_id' attribute, but why does this make it necessary to upgrade the version of mariadb? 

"op.alter_column('subnets','network_id', nullable=False, existing_type=sa.String(36))" run *-db sync" it will be upgrade our local project's db, I think it's ok to run even if I don't upgrade the mariadb from v10.1 to v 10.3, right?

brinzhang

> Hi Sheldon,

> On Sat, Sep 5, 2020 at 3:52 AM Sheldon Hu(胡玉鹏) <huyp at inspur.com> wrote:
>
> Thx for reply
>
> As of mysql compatibility, could you give me a 'for instance' to detail like 'which part of ussuri code must need mysql v10.3.x, if we use mysql v10.1, the code will not run correctly '.

> I just reviewed this and it was even earlier - in Train:
> https://bugs.launchpad.net/kolla/+bug/1841907
> afair, some other projects also introduced such incompatibilities due to testing against MySQL.

> -yoctozepto