lalewis1 opened a new issue, #3717: URL: https://github.com/apache/jena/issues/3717
Hi Jena Team, I just discovered that SPARQL queries using geosparql spatial relations like `FILTER(geof:sfWithin(?geom1, ?geom2))` do not hit the spatial index. But property functions like `?geom geo:sfWithin ?envelope .`, do utilize the spatial index. The docs state that the Index is optional for geosparql spatial relations which kind of makes it sound like they would use the index if it is provided. I think that a disclaimer to this effect would be great to include on the geosparql docs page. A second point: There also seems to be a massive difference in performance with the spatial index for rectangular polygons and free form polygons. Would love to see a write-up of why that is and perhaps a warning or something to explain that this is the case. (if it is!?). Noting that this hasn't been an issue until recently when we have started to use Fuseki against ~ 600GB sized datasets. I note that there is clearly lots of work going on in this space for Jena 6. So this might all be changing soon anyway. Thanks -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
