[benesch]

> well, minimal SQL support - there's no RETURNING, ON CONFLICT or json

We support both `INSERT ... RETURNING` [0] and the `jsonb` data type [1]. The only feature in your list that we're actually missing is UPSERT (i.e., `INSERT ... ON CONFLICT`). We have a tracking issue [2] if you're interested in following along.

> But unfortunately they only seem to be interested in enterprise customers: Not only is it not open source, but there's no open sign up and pricing for compute nodes isn't publicly available!

Rest assured: we're working towards open sign up! We're at the very beginning of our early access period.

[0]: https://materialize.com/docs/sql/insert/#details

[1]: https://materialize.com/docs/sql/types/jsonb/

[2]: https://github.com/MaterializeInc/materialize/issues/6668