That's basically what SQLite is (notably, SQLite makes an effort to be compatible with Postgres's SQL syntax). If you mean based off the actual PostgreSQL codebase, then I highly doubt it.

I doubt it as well.

That's sad though because SQLite is really missing a lot of features that PostgreSQL has.

> That's sad though because SQLite is really missing a lot of features that PostgreSQL has.

It is, but luckily it's not standing still. It's added JSON support and window functions in recent years for example.