There was a conversation back in September about left outer joins with
additional where criteria:
http://sourceforge.net/mailarchive/message.php?msg_id=34475671<http://sourceforge.net/mailarchive/message.php?msg_id=34475671>
I was wondering if any progress had been made on the issue since then, or
whether there are any new features we could use for dealing with this case.
Also, I (partially) disagree with, or don't understand, the part that "it's
okay to have a variety of conditions, but they each require a new named
relationship". In a strict relational model, yeah, you're right. But left
outers, even NULLs, have always been in the gray never-never land between
pure relational algebra and hacked-up real-world database software.
I tend not to think about the additional clauses in the left outers as a new
named relationship. They're more a kind of data-driven relationship.
Admitted, I know jack about your architecture, but maybe a generics/template
model will satisfy the design?
Schnitz
BTW - John, I love reading your stuff on ArsTechnica. I read it word for
word. All 21 pages. :)
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