R. David Murray wrote:

> On Sat, 17 Feb 2001, Joachim Werner wrote:
>> SQL or ZODB+ZCatalog, which one is better?
>> Any comments?
> Just the obvious one: ZPatterns. <grin>.

OK, this was the standard answer, right. But
what I don't really get is: How can ZPatterns
help me here? If My underlying storage can't
do what I want it to do (let's say very expensive
queries -- which is what ZCatalog can't really
do well), how can an abstraction layer on top
of it solve my problems?

And on the other hand, if I only have one option
that does what I want (let's say using SQL) and I
know that in advance, why should I use ZPatterns

And, instead of switching back-ends in ZPatterns,
I could as well just rewrite my non-ZPattern objects
to work with the new back-end, which doesn't seem to be
more work. I mean, if I switch from using ZClasses/ZCatalog
to ZSQL in ZPatterns, I still have to rewrite all my
methods that handle storage and data retrieval. ZPatterns
don't do that for me.

I have read and seen a lot of ZPatterns stuff, but
I still haven't seen something where I really NEED
ZPatterns to get a better solution for a problem.



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