Hi!
On 1/14/17 9:23 AM, Adrian Bielefeldt wrote:
> I was wondering if anybody could help me understand why (and how) this
> query:
>
> SELECT DISTINCT ?item
> WHERE
> { ?tree0 wdt:P31 ?item . BIND (wd:Q146 AS ?tree0) }
>
> is being accepted by query.wikidata.org.
Probably Blazegraph engine considers it analogous with the query having
the bind in front, or maybe optimization reorders it.
> At the moment we are parsing them using OpenRDF, which fails (as far
as I can see understandably) at parsing this query.
Well, the standard does say you can not use a variable in BIND that was
previously used, and I guess OpenRDF parser chooses to be more strict
than Blazegraph.
--
Stas Malyshev
[email protected]
_______________________________________________
Wikidata-tech mailing list
[email protected]
https://lists.wikimedia.org/mailman/listinfo/wikidata-tech
