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RE: JW10: QSD usage

From: Jim Davis <jrd3@alum.mit.edu>
Date: Mon, 09 Aug 1999 17:09:14 -0700
Message-Id: <4.1.19990809170652.00a573e0@192.168.254.128>
To: Niket Patwardhan <niket@verity.com>, Jim Whitehead <ejw@ics.uci.edu>, "Babich, Alan" <ABabich@filenet.com>, "'DASL'" <www-webdav-dasl@w3.org>
At 05:03 PM 8/9/99 -0700, Niket Patwardhan wrote:
>I think the key is what you mean by "succeed". The SQL model is to flag
>problems (such as column names that don't exist) as an error, causing the
>whole query to fail. The usual text retrieval philosophy is to avoid
>returning errors, by treating that portion of the query as either true,
>false or don't care. Given that type of philosophy, things would always
>succeed, but would return more or less documents depending on the server.

that's where the three-valued logic (as explained by Alan) comes in.

the query won't fail (by fail I mean return a 4xx or 5xx) for missing
columns.  But if the column isnt there, the query won't MATCH either.

Is this acceptable?
Received on Monday, 9 August 1999 20:14:59 GMT

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