pg_jsonschema VS FerretDB

And lots of interesting extensions use it, like

https://github.com/tembo-io/pgmq

https://github.com/zombodb/zombodb

https://github.com/supabase/pg_jsonschema

> In other words, there is still a (lossy) translation layer, it just happens to be in the RDBMS rather than in-app.

It's not lossy if your application can guarantee a json <-> datatype roundtrip and the json is validated with jsonschema (generated by your application)

In Rust it's something like this

https://serde.rs/ to do the data type <-> json mapping

https://docs.rs/schemars/latest/schemars/ to generate jsonschema from your types

https://github.com/supabase/pg_jsonschema to validate jsonschema in your database (postgres). with this setup it's interesting (but not required) to also use https://docs.rs/jsonschema/latest/jsonschema/ to validate the schema in your application

Pretty exciting!

What about optionally validating some columns with jsonschema? Perhaps using https://github.com/supabase/pg_jsonschema - is using other postgres extensions supported in FerretDB? (if not, maybe it's feasible to incorporate the code of pg_jsonschema in FerretDB?)

I'm not currently using it, but I'm strongly considering validating json in postgres with https://github.com/supabase/pg_jsonschema - which uses the https://docs.rs/jsonschema/latest/jsonschema/ Rust crate

So I'm not sure if my feedback is valid but, I sure hope that the jsonschema crate follows the spec! Otherwise I'll never use jsonschema but instead something-not-exactly-jsonschema. In other words.. you better not break anything.

Sounds dumb, but I want JSON field schema validation. I added a JSON column for flexible data, and although I'm happy with its flexibility, I kinda hope I can validate the JSON data structure. Recently I just found an extension [1] and will try soon.

[1] https://github.com/supabase/pg_jsonschema

https://github.com/supabase/pg_jsonschema is new and looks good

Born as an excuse to play with pgx, pg_jsonschema is a solution we're exploring to allow enforcing more structure on json and jsonb typed postgres columns. Only 10 lines of code 😎

if you have postgres, just use https://github.com/FerretDB/FerretDB

FerretDB is an open source document database that adds MongoDB compatibility to other database backends, such as Postgres and SQLite. By using FerretDB, developers can access familiar MongoDB features and tools using the same syntax and commands for many of their use cases.

There is FerretDB. But they are not fully compatible to Mongo yet.

https://www.ferretdb.io/

Feature parity progress with apps:

https://github.com/FerretDB/FerretDB/issues/5

I presume, that after there is feature parity, then someone could run some benchmarks.

Yep that's serious issue and it's similar to our case. Our main product can work just fine even without SSE 4.2 but MongoDB requires it and then indirectly leads to AVX1 support as we use MongoDB as storage. We did PoC with FerretDB last month and I think it may be good option for Gerylog: https://www.ferretdb.io

Shout out to FerretDB, which is an in progress open source re-implementation of MongoDB atop PostgreSQL.

https://github.com/FerretDB/FerretDB