learndb-py VS btree

Especially the VM part: https://github.com/spandanb/learndb-py/blob/master/learndb/v...

Compare it with this: https://github.com/sqlite/sqlite/blob/master/src/vdbe.c

That's said, I'm curious how complete this LearnDB is. SQLite is hard to read not only it's old but also it covers a lot of SQL and following SQL spec makes hings complicated. SQLite has great test suite so it's nice if you run the suit against this implementation.

For a simple and readable implementation of a Python btree see this:

https://github.com/samsquire/btree

I tried to keep the implementation as simple as I could.

Btrees can be really simple, I've written a super simple understandable readable btree here.

https://github.com/samsquire/btree

It doesn't balance laterally like some B+ btrees do but it handles splits in a really simple way.