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

[Paul Ramsey]

> Yeah, that's one good argument. The reason the 8.3 changes hit us so hard
> were because we were accessing the varlena structures directly rather than
> using the relevant macros :(

Speaking of which, I see those damned macros sprinkled hither and yon,
but I have no idea where they are documented. PgSQL source code only?
It would be nice to know what they do.

P.