[OSM-dev] osm2pgsql diff mechanics

[Lennard]

> Now my question: If I cleaned a geometry (e.g. forest) and a diff
> specifies a change in this geometry, what will happen?
>
> 1.) Will the geometry completely be replaced by the new geometry as
> specified in the diff.

As far as I expect it to work: The diff will be applied to the slim mode
tables (_nodes, _ways, _rels) and then a new geometry will be built and
added/updated in the applicable geometry tables (_point, _roads, _line,
_polygon).

-- 
Lennard