SQLite is written in C. And the most commonly used SQLite driver interfaces to that compiled C code directly via JNI. The PostgreSQL client driver is written i

SQLite is written in C. And the most commonly used SQLite driver interfaces to that compiled C code directly via JNI. The PostgreSQL client driver is written in pure Java on the other hand. Has nothing to do with language used. You can wrap anything in a jar (it’s just a zip file). You could certainly embed PostgreSQL in a jar and you can do something similar to this https://github.com/electric-sql/pglite https://github.com/electric-sql/pglite I don’t think there’s that much interest, but it is doable. EDIT: https://github.com/zonkyio/embedded-postgres https://github.com/zonkyio/embedded-postgres