Re: [Hibernate-devel] Re: Select queries, queries by criteria, query by example

[Gavin_King/Cirrus%<CI...@ci...>]

....back....

sorry, didn't mean to sound so hostile to suggestions in the last mail...
I kinda got pulled away 1/2way through typing it up.....

Anyhow, I don't think either of those features would be hard to implement
but I would need to see a *very* good justification for the extra APIs
needed for "query by specification".

Note that either could be *very* easily implemented as an add-on to
Hibernate (ie. no change to internal code) if they first generated a
Hibernate query string which was then executed using existing
functionality. Of course, this is a kind of double-compilation that has
some performance implications. (In reality, I don't think you would
notice much because Hibernate caches compiled queries).

I *do* think "query by example" is pretty cool - but could you tell me
how they distinguish a null value from an unset property ... or a zero
primitive value from an unset property? I never figured that out...

thoughts?