Swifty RA ☀️

Relational Algebra* in Swift.

This is just a pet project to see how two worlds of dynamic data representation and strong type system can be combined together using Swift. And a playground to try out different Swift tools to build embeded DSLs.
This project is not intended for any production usage, at least for now.

TODO

• provide verbose errors & user-friendly description (especially if complex query processing fails)
• rewrite eager to lazy query processing (custom iterators?)
• tests and refactoring (value operations, functions, query processing, tuples, non-empty collections etc)
• suport more value types
• support indexing and primary keys
• think of foreign keys
• optimize query tree
• serialize/deserialize to/from Relation

*there is a notion of non-required value which means it can be NULL, whereas Relational Algebra doesn’t support such.