[postgis-devel] What's the difference between geom_accum and built in postgresql array_append

[Obe, Regina]

I was trying to take a stab at understanding the postgis internal
workings and one question that has always puzzled me is

Why are we using a postgis geom_accum function instead of the built in
PostgreSQL array_append function to define our aggregates.  I did a
couple of simple tests and the timings always seem pretty much exactly
the same.

The only thought I could think of why this was done was
1) Its easier to debug the internal workings of the array
2) and its possible to internally throw PostGIS specific errors

Does that about sum it up or are there other reasons I am missing?

Thanks,
Regina
-----------------------------------------
The substance of this message, including any attachments, may be
confidential, legally privileged and/or exempt from disclosure
pursuant to Massachusetts law. It is intended
solely for the addressee. If you received this in error, please
contact the sender and delete the material from any computer.