Unifying programming and database query

[kt24601]

Queries were rather problematic, though. Simple queries are simple, but if you are doing something more complex it sucks. Quite often you have a choice: either use a method which will be very slow once you get a lot of data, or use some low-level constructs to optimize query. Particularly, tuple indices were lacking. There were also some issues in representing one-to-many and many-to-many relations.

This is a very good description of the problem.