If this interests you, I highly recommend exploring the documentation in the postgres source: https://github.com/postgres/postgres/tree/master/src/backend/acce

If this interests you, I highly recommend exploring the documentation in the postgres source: https://github.com/postgres/postgres/tree/master/src/backend/access/nbtree https://github.com/postgres/postgres/tree/master/src/backend... https://github.com/postgres/postgres/blob/master/src/backend/utils/sort/tuplesort.c#L4 https://github.com/postgres/postgres/blob/master/src/backend...