看到 OxideDB 這個專案：
OxideDB is a translation layer that works as a MongoDB database server while using PostgreSQL's JSON capabilities as the underlying data store.
跟之前提到的 MangoDB 有些淵源 (參考「MangoDB：拿 PostgreSQL 當作後端的 MongoDB 相容層」)，順便提一下 MangoDB 後來被要求改名為 FerretDB：「MangoDB 改名為 FerretDB (雪貂)」。
主要的差異在於 OxideDB 只以 PostgreSQL 為底層，另外是用 Rust 寫的：
The project was heavily inspired by FerretDB and is on its early days. The main difference is that there is no intention to support any database other than PostgreSQL (FerretDB is also supporting Tigris) and it's written in Rust, as opposed to Go.
看起來大家都拿 PostgreSQL 在搞事，但這個專案裡面好像沒搜到 GIN 這個關鍵字，不知道是不是連 index 都沒下...