Re: SQL to RDF access ?

Hi,

In Oracle, I think you can create a view on a select on sem_match. e.g.

CREATE VIEW proteinOrganism AS
SELECT p AS PROTEIN, o AS ORGANISM FROM TABLE(SEM_MATCH(
'PREFIX c:<http://purl.uniprot.org/core/> SELECT ?p ?o WHERE {?p a
c:Protein . ?p c:organism ?o}',
SEM_MODELS('UNIPROT_2015_08'), null, null, null));

Something similar is possible in Virtuoso, and surely DB2

In PostgreSQL, you could use
https://github.com/cyga/www_fdw/wiki/Documentation
to map sparql results into views.

However, all will requires certain maintenance workloads.

For the experimental stuff you could look at MonetDB/RDF or Virtuoso-CS
(not yet public)
http://homepages.cwi.nl/~duc/papers/emergentschema_www15.pdf

Regards,
Jerven



On Fri, Oct 2, 2015 at 3:04 PM, Mikel Egaña Aranguren <
mikel.egana.aranguren@gmail.com> wrote:

> Hi;
>
> My understanding is that Andrea wants the opposite: rewrite SQL queries to
> SPARQL queries, not access to SQL DBs with SPARQL. Anyway if the latter is
> the case, apart from D2R, the new Stardog release includes virtual graphs
> to access tabular (SQL, CSV files, ... ) data:
> http://docs.stardog.com/#_virtual_graphs.
>
> Mikel
>
> 2015-10-02 14:34 GMT+02:00 Richard Boyce <rdb20@pitt.edu>:
>
>> Hi Andrea, I think that D2R Server is very helpful here:
>> http://d2rq.org/d2r-server
>>
>> All can be done with a mapping file that you configure. The server
>> provides a SPARQL web query  interface (SNORQL) but also can dump to an RDF
>> file that you load in a separate store.
>>
>> hope it helps,
>> -R
>>
>>
>> On 10/02/2015 07:37 AM, Andrea Splendiani wrote:
>>
>> Hi,
>>
>> I am wondering if some of you knows of some tool that can translate (a
>> subset) of SQL to SPARQL (perhaps requiring some constraints on the RDF
>> representation).
>> In principle it should be simple: classes can appear as tables, URIs as
>> IDs, datatype properties as columns and object properties as Fkeys.
>> Is there something implementing this translation available, that some of
>> you know ? One current option (I think) is via Oracle, but I am wondering
>> if there is something like-weight.
>>
>> As of why I am interested in it... it's curious: I may have an RDF graph
>> representing a unified set of sources (some of which native in RDF, some of
>> which virtualized from SQL).
>> Still people like to query the sql sources in sql, just because they know
>> it better. But like this, they miss the whole integration (and a more
>> flexible data model).
>>
>> best,
>> Andrea
>>
>>
>>
>> --
>> Richard D Boyce, PhD
>> Assistant Professor of Biomedical Informatics
>> Faculty, Center for Pharmaceutical Policy and Prescribing
>> Faculty, Geriatric Pharmaceutical Outcomes and Gero-Informatics Research and Training Program
>> University of Pittsburghrdb20@pitt.edu
>> Office: 412-648-9219
>> Twitter: @bhaapgh
>>
>>
>
>
> --
> Mikel Egaña Aranguren, Ph.D.
>
> http://mikeleganaaranguren.com
>
>
>


-- 
Jerven Bolleman
me@jerven.eu