[postgis-devel] Faster Accum

[Paul Ramsey]

I've started on bringing the 8.4 array_agg back into our tree. Oddly,
the code for much of it exists in the postgresql tree already, back to
8.0, so the amount of in our tree is fairly slight.  Unfortunately,
because the idea is to pass an internal pointer around, and CREATE
AGGREGATE doesn't like that, there's some updating of system tables
required to fully hook it up.

It's called ST_GeometryArray(), have a look.

P.