Jacek Laskowski wrote:
I'm going thru the EJB 2.1 spec and I came across the question: is
EJB-QL a subset of OQL ? How do they relate to each other ? Comparision
matrix of both would be of great help.
I haven't been able to find the answer anywhere, thus the question. As
the spec doesn't even mention ODMG, I guess they're separate concepts
with *very* similar syntax.
I think you answered your own question. EJB QL and OQL obviously solve
the same problem (mapping the object-oriented world to the relational
one) but as far as I can tell, they were developed totally in parallel,
although obviously, they probably got inspiration from SQL and from each
other.
As for comparing them, I don't have a matrix for you but if such a thing
existed, it would need to factor in the various extensions that each
vendor added to either.
--
Cédric
http://beust.com/weblog
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