Alexey Palazhchenko

I think it is fine to keep that task in the icebox for now

May you post MongoDB's response in that case? It should be visible in the proxy output.

Both are from different requests

> we either need to add writeError to the place where we write response (msg_delete) Let's do that, at least, for now

Too many things changed in the meantime.

I think that comment belongs to #3

Good answer to what "pushdown" is: https://qr.ae/pv48xk

Just like everything else in FerretDB: by generating one or more queries, sending them to PostgreSQL, converting results. We don't know better yet.

The documentation is a bit confusing. I will write an integration test to see how MongoDB behaves.

I added tests: https://github.com/FerretDB/dance/blob/main/tests/ferret/core_test.go In short, an unordered insert saves all valid documents, while an ordered insert stops on the first error while still saving previous documents. Both cases do...