[postgis-devel] Aggregate STYPE

[Paul Ramsey]

Memory test, ancient developers:

The CREATE AGGREGATE for ST_Union has

   stype = pgis_abs

The CREATE AGGREGATE for ST_AsMVT has

   stype = internal

Now, pgis_abs is just a stub type, it's not real at all, the
input/output functions don't do anything, etc. So, is the retention of
that type an echo of an earlier time when it wasn't possible to
aggregate with an internal stype, or is there an *extra* reason why we
don't just use stype=internal for ST_Union()?

P.