Hi Hugh,
I will try that. Thanks for the suggestion!
With regards,
Jason Koh
cseweb.ucsd.edu/~jbkoh
On Tue, Feb 13, 2018 at 3:17 AM, Hugh Williams <hwilli...@openlinksw.com>
wrote:
> Hi Jason,
>
> No such bif:match function exists in Virtuoso ...
>
> You should be able to use a filter clause in conjunction with bif:contains
> to get a performant exact match with something like:
>
> select * where {?s ?p ?o . ?o bif:contains '"Nevis"' FILTER
> (?o="Nevis"@en)}
>
> See the following live example against DBpedia:
>
> http://dbpedia.org/sparql?default-graph-uri=http%3A%2F%
> 2Fdbpedia.org&qtxt=select+*+where+%7B%3Fs+%3Fp+%3Fo+.+%
> 3Fo+bif%3Acontains++%27%22Nevis%22%27+FILTER+%28%3Fo%
> 3D%22Nevis%22%40en%29%7D&format=text%2Fhtml&CXML_redir_
> for_subjs=121&CXML_redir_for_hrefs=&timeout=30000&debug=on&run=+Run+Query+
> <http://dbpedia.org/sparql?default-graph-uri=http://dbpedia.org&qtxt=select+*+where+%7B?s+?p+?o+.+?o+bif:contains++'%22Nevis%22'+FILTER+(?o=%22Nevis%22@en)%7D&format=text/html&CXML_redir_for_subjs=121&CXML_redir_for_hrefs=&timeout=30000&debug=on&run=+Run+Query+>
>
> Best Regards
> Hugh Williams
> Professional Services
> OpenLink Software, Inc. // http://www.openlinksw.com/
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> Universal Data Access, Integration, and Management Technology Providers
>
>
>
> On 12 Feb 2018, at 22:05, Jason Koh <jb...@eng.ucsd.edu> wrote:
>
> Hi,
>
> I would like to optimize objects of ``?s base:name ?o`` and previously
> suggested to use bif:contains. However, as the query needs to be exact
> matching, I wonder if there is a function like bif:match. (It looks like
> none but would like to learn the reasoning.)
>
> Regex must work but I found that it does not use the same index as
> contains.
>
> Thanks!
>
>
> With regards,
> Jason Koh
> cseweb.ucsd.edu/~jbkoh
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