I am working on slides for my tutorial and ideal want to give a demo that shows a query being planned differently depending on the reordering strategy used. A simple command line switch would have been the easiest way.
Likely I'll need to write some simple code to demonstrate the differences in scheduling instead Rob On 12/03/2014 14:39, "Andy Seaborne" <[email protected]> wrote: >On 12/03/14 11:32, Rob Vesse wrote: >> Andy >> >> Is there a way to choose the TDB reordering strategy when using the TDB >> command line tools or is it only configurable by placing the relevant >>.opt >> file in the database directory? >> >> Rob >> >> >> > >Rob, > >Only via an .opt file at the moment. fixed.opt means it's as the queyr >is written. > >What's more, the new(er) reorder/filter code in ARQ does not work with >TDB yet (it gets switched off) and the old TDB code applies. So TDB's >optimization of FILTER is less general and the order of BGPs if rdf:type >is involved can (not often) be less than ideal. > >Work-in-progress - I don't want to kludge it now then have to redo that >when a rework TDB execution/optimizer is ready. Making changes is easy >enough - testing is time consuming. The new execution framework is >mostly (ha!) written and partially tested. > >Did you have anything particular in mind? > > Andy >
