When trying to write a recursive CTE using the PostGIS geometry type,
I was told this:
ERROR: could not implement recursive UNION
DETAIL: All column datatypes must be hashable.
Is it possible to make custom types hashable? There's no hook in the
CREATE TYPE call for a hash function, but can one be hooked up
somewhere else? In an operator?
Thanks,
P
--
Paul Ramsey
http://cleverelephant.ca
http://postgis.net