- Database column defaults?
- Pre-compute foreign keys, attributes and join types (forward-ref or backref) in the AggregateQueryResultWrapper.iterate method.
- Improve the performance of the QueryCompiler.
- Follow foreign keys through fields, e.g. Tweet.user.username, or Comment.blog.user.username.
- Simplify the node types: * Node (base class) * Expression * Quoted * Clause
- Parsing should be context-aware, which would reduce some of the hacks, particularly around IN + lists.