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ASF GitHub Bot commented on JENA-1277: -------------------------------------- Github user ajs6f commented on the issue: https://github.com/apache/jena/pull/205 @osma Yeah, that's what I meant tho'-- use a calculation (via `BIND`, I guess?) of the distance (and we have [√ available to use](https://jena.apache.org/documentation/query/library-function.html)) and order by that. To be clear, I'm not suggesting that that's a great solution (and I haven't thought at all about the complexities of diff coordinate systems), just that it's better than relying on undocumented impl behavior which can change (and WILL change with this PR! :) ). > Spatial Queries Very Slow For Large Databases > --------------------------------------------- > > Key: JENA-1277 > URL: https://issues.apache.org/jira/browse/JENA-1277 > Project: Apache Jena > Issue Type: Improvement > Components: Spatial > Affects Versions: Jena 3.1.1 > Environment: Linux Ubuntu > Reporter: samur araujo > Assignee: Osma Suominen > Attachments: spatial-assembler.ttl > > > I loaded geonames on Jena but the spatial queries take more than 3s to > execute. The query is below: > PREFIX spatial: <http://jena.apache.org/spatial#> > PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> > SELECT distinct ?place > { > ?place spatial:intersectBox (32.55668 -117.12865 32.56668 -117.13865) . > > } > The data can be downloaded here: > https://drive.google.com/file/d/0B-fwYPJYT1GOYVVIZF9ROUxzclk/view?usp=sharing > For small datasets the queries are executed in 200ms, very fast. I noticed > that when I access the lucene index directly the queries are also very fast, > about 20ms. > The issue may be related to the pos-processing of lucene results. -- This message was sent by Atlassian JIRA (v6.3.4#6332)