Decibel! wrote:
On May 29, 2008, at 6:08 PM, Jan Urbański wrote:
Preference SQL is an extension to regular SQL, that allows expressing
preferences in SQL queries. Preferences are like "soft" WHERE clauses.
This seems like a subset of http://pgfoundry.org/projects/qbe/ ... or do
I misunderstand?
I skimmed through the QBE howto, and I think it's actually far from it.
The thing that closely resembles preference clauses is the SKYLINE OF
operator, mentioned eariler in the thread - there is some archives
coverage on it.
I'm still working on producing a comparision of preference SQL and the
skyline operator, more to follow soon.
--
Jan Urbanski
GPG key ID: E583D7D2
ouden estin
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