[
https://issues.apache.org/jira/browse/JENA-1277?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15849756#comment-15849756
]
ASF GitHub Bot commented on JENA-1277:
--------------------------------------
Github user rvesse commented on the issue:
https://github.com/apache/jena/pull/205
We should already have support for most of the trigonometric functions
built into ARQ as extension functions -
https://github.com/apache/jena/tree/59e5e06c85c98c9c65a9c1addbc4252626e9d061/jena-arq/src/main/java/org/apache/jena/sparql/function/library/leviathan
For example:
```
sparql --data ~/Documents/Work/Datasets/minimal.nt "SELECT
(<http://www.dotnetrdf.org/leviathan#sin>(90) AS ?x) { }"
------------------------
| x |
========================
| 0.8939966636005579e0 |
------------------------
```
Notes:
- Inverse functions are named as `sin-1` etc.
- function arguments are expected to be radians
- convenience functions `degreesToRadians` and `radiansToDegrees` are
provided
> 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
(v6.3.15#6346)
