The bug has been submitted [1]. I fear this bug is tough to reproduce, so I
tried hard to make a mysql-only case, using different users and grants to
two databases. Didn't work, it always renders the same query.
[1]
https://sourceforge.net/tracker/?func=detail&aid=3119958&group_id=111002&atid=657968
Diogo F.C. Patrão
Manager of Medical Informatics
Biotechnology Laboratory
Hospital A.C. Camargo
http://www.accamargo.org.br/
On Fri, Nov 26, 2010 at 3:47 PM, Christian Brenninkmeijer <
[email protected]> wrote:
> On 26/11/2010 17:17, Richard Cyganiak wrote:
> > That being said: Having two d2rq:Databases in a single mapping file
> > isn't really supported by the D2RQ SPARQL-to-SQL engine. It may or may
> > not work, depending on rather random factors. But still, the choice of
> > expansion for the "map:" prefix shouldn't affect the generated query.
> >
> I noticed that too.
> I (a complete D2R novie) think it looks like the engine tries to pick
> which database to query.
> if it can find anything in the query to point to one of the databases it
> stops looking and just queries that one.
> For example if you reference for a type only in one database.
>
> Only queries where there is no way for the optimizer to pick a database
> appear to work on multiple databases at the same time.
>
> Is this something you are thinking of supporting in the Future.
> I ended up moving to Jena because of it.
>
> Regards
> Dr Christian Brenninkmeijer
> University of Manchester
>
>
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