[postgis-devel] chunked GeomUnion commit

[Markus Schaber]

Hi, Strk,

strk at refractions.net wrote:

> This one is the version that doesn't require dump/reload
> so will still get full geometry set in input, but will
> chunk it before passing to GEOS for processing.
> 
> I don't feel comfortable breaking the scripts interface
> so far. Please make your tests with this setup.
> 
> You can fine-tune chunk size changing the MAXGEOMSPOINTS
> #define around line 267

Would it be the best method to make GEOS / JTS expose their intermediate
state (graphs etc.), so postgis could incrementally add geometries by
re-feeding this state into GEOS / JTS?

When using JTS I stumble over just the same problem of efficiently
aggregating multiple geometries, because there is no way to
incrementally do this, and buffer(0) does only work with areas.

Markus