Thanks to all and especially Andy for pointing me to this paper :) Laurent
On Fri, Oct 28, 2011 at 1:31 PM, Andy Seaborne <[email protected]> wrote: > On 26/10/11 08:39, Dave Reynolds wrote: >> >> On Tue, 2011-10-25 at 21:38 +0200, Laurent Pellegrino wrote: >>> >>> Hi all, >>> >>> Is it possible to retrieve the last N quadruples which have been >>> inserted into a Jena TDB datastore when the quadruples which have been >>> inserted do not contain any information about their publication time >>> (e.g. a jena built-in function to use in order to order by using the >>> internal identifiers used by the repository)? >> >> I don't believe there is such an insert timestamp available. > > There is no such timestamp. > > There was a paper at ISWC2011 that suggested using timestamps on something > (e.g. B+Tree blocks) to guide caching. [1] > > But as Greg (The presenter) said, "it cuts through every layer of > abstraction in a system to provide that information." and various > implementers in the audience smirked. > > So a system derived from TDB to add it maybe done by someone who s' > interested. Also, for most users, it would be a noticable cost. > > Andy > > > [1] > Enabling fine-grained HTTP caching of SPARQL query results > Gregory Todd Williams and Jesse Weave > > http://iswc2011.semanticweb.org/fileadmin/iswc/Papers/Research_Paper/03/70310752.pdf > >> >> Dave >> >> > >
