[TYPO3-mvc] $query->contains('feUser.usergroup', $myGroup) creates incorrect SQL syntax

[Domi]

Hello

> Extbase has no native support for the TCA type "group" yet. You can use
> group fields of internal_type 'db' and a relation to a single table
> though, but you need to additionally define 'foreing_table'
> =>  'nameOfTable' in your TCA in order to make it work.

This was it :) Just moved to a select type and it works. Thanks for your 
response, helped me a lot!

Regards,
Dominic