Cancellable spatial property functions

[Aklakan]

Version

5.3.0-SNAPSHOT

Feature

In jena-geosparql, many (if not all) property functions do not respect query cancellation.
For example, accidentally executing a query such as below creates a cross product of all geometries in the store which may run for days, weeks or longer, regardless of the query timeout setting.

PREFIX geo: <http://www.opengis.net/ont/geosparql#> SELECT * { ?a geo:sfIntersects ?b . }

The proposed solution is to improve the implementations in jena-geosparql to make more use of the QueryIter machinery which provides the cancellation system.

Are you interested in contributing a solution yourself?

Yes