[OpenBD] UnQL implementation for mongodb

[David Mulder]

OK, just a random thought I decided to throw up, we already have a 
fairly good SQL parser, why wouldn't we use it to implement a subset of 
UnQL <http://www.unqlspec.org/display/UnQL/Example+Queries+and+Usage>to 
query mongodb. As far as I can see it can't be too hard (as we already 
have QoQ and the simpleDB implementations) and we could claim to have 
the first UnQL implementation (UnQL will only get more popular and if 
you drop a mention of OpenBD integrating the first UnQL implementation 
on wikipedia that's bound to have some effects XD ). Aside of that, not 
sure how useful it would /really/ be, but I imagine it's quite useful 
and cool to be able to access all databases through cfquery. If we would 
want to do it the following resources might be quite useful: Link 1 
<http://www.mongodb.org/display/DOCS/SQL+to+Mongo+Mapping+Chart> and 
link 2 <http://rickosborne.org/download/SQL-to-MongoDB.pdf> . Although 
of course the sql would need to be extended with UnQL behavior (hmm, 
although that would mean as well that the tag wouldn't be backward 
compatible as UnQL will probably still be changing, but that's fine as 
far as I am concerned (or it could be separate jar file which will allow 
independent updating of the openbd core)).
  David Mulder

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