Schema diff fails with MariaDB 10.2 about installation-bundle

[fritzmg]

@leofeyer all tickets (including https://jira.mariadb.org/browse/MDEV-13132) are closed now, yet the issue still exists.

[m-vo]

Had a quick look in the debugger. It's the same issue as in here: contao/core-bundle#918 (comment)

So _default equals "''" in $fromSchema vs. "" in $toSchema.

(Also: doctrine entities get created successfully but then are missing in the $fromSchema. Not sure if this had worked before.)

[leofeyer]

See contao/core-bundle#918 (comment)

[m-vo]

I am still not sure if it's a MariaDB or a doctrine issue. But it looks like it is the latter as doctrine seems to only support MariaDB 10.2. as of v2.7 which is not released yet.

I can confirm that using the current doctrine/dbal dev-master branch solves the default value problem but it could still take a long time until a stable branch will get released. So unfortunately Contao is not compatible to Maria DB 10.2 right now, right? :-/

[leofeyer]

Correct, you need Doctrine 2.7 (not yet released).