Author of gh-ost here. Actually, it should be possible to support child-side foreign keys. They would have to be named differently (the foreign key constraint has a unique name in a schema) -- but it should work. See discussion in https://github.com/github/gh-ost/issues/507
It is true that it is not on our roadmap to implement FK support for gh-ost (see https://github.com/github/gh-ost/issues/331), but if anyone wishes to contribute support for FK we're grateful. We've had more complex contributions coming from the community and we're grateful for those.
It is true that it is not on our roadmap to implement FK support for gh-ost (see https://github.com/github/gh-ost/issues/331), but if anyone wishes to contribute support for FK we're grateful. We've had more complex contributions coming from the community and we're grateful for those.