Something like that does sound interesting although I suspect easier said than done. I inquired about something similar when I was looking at Postgres text search. It sounds like it is currently not that easy for an end user to extend DAL to create a new type of query. That would be cool.
And I wonder what's going to be the best way to support all these new NoSQL DBs. DAL's query syntax should be able to support a lot of the core queries but it seems that to really take advantage, some new approaches might be necessary. Fun times!
