- From: Steve Harris <steve.harris@garlik.com>
- Date: Mon, 23 Nov 2009 10:53:42 +0000
- To: "public-rdf-dawg@w3.org Group" <public-rdf-dawg@w3.org>
On 22 Nov 2009, at 16:05, Andy Seaborne wrote:
[snipped a lot]
> My current preference is:
>
> DELETE WHERE { X }
>
> where X is BGPs + GRAPH + FILTER.
>
>
> (The question for me is more whether we should do less, not more,
> than that.)
I think my preference is BGPs + GRAPH only. Possibly no bNodes too,
depending on what the exact semantics of bNodes are in this case.
I'm not really adverse to FILTER, but I have systems where optmising
DELETE WHERE { ?x a <Foo> } etc. is really easy, but
WHERE { ?x a ?type . FILTER (REGEX(STR(?type), "Foo")) } (i.e.
anything that doesn't trivially optimise down to algebra expressions)
is hard to do. Personal bias :)
Would be nice to have some form of DELETE that will always be fast,
relative to the amount of data it has to remove.
- Steve
--
Steve Harris, CTO, Garlik Limited
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Received on Monday, 23 November 2009 10:54:17 UTC