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Posted to dev@jena.apache.org by "Osma Suominen (JIRA)" <ji...@apache.org> on 2017/02/09 13:22:42 UTC
[jira] [Updated] (JENA-1277) Spatial Queries Very Slow For Large
Databases
[ https://issues.apache.org/jira/browse/JENA-1277?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Osma Suominen updated JENA-1277:
--------------------------------
Fix Version/s: Jena 3.2.0
> 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
> Fix For: Jena 3.2.0
>
> 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.
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