[OSM-dev] osm2pgsql hstore support

[Peter Körner]

[1> On the one hand, this has the potential to greatly increase the size of
> the db, as you will now get all kinds of tags you're never interested
> in. On the other hand, one can now quickly use keys one never used
> before, without the need to reimport the whole db.

When you just want to render a specific type of map you won't need it 
and there's no reason in not using it. But if you're setting up a 
dev-server like the wikimedia toolserver or the osm dev server, you got 
a whole bunch of people with a lot of ideas.

Atm you'll need to tell them "wait a month or two, i'll add your column 
at the next re-import" Using hstore they just can start working on 
whatever they want.

Another use case lies in "under construction" tags like those used by 
Lulu-Ann for the "OSM for the blind"-Project [1].

Peter

[1] http://wiki.openstreetmap.org/wiki/OSM_for_the_blind