Process diffs with extra table

I have splitted off the places from the osm_point table and I'm wondering how the processing of diff files is going to work.

In my testsetup I have this for the points: function osm2pgsql.process_node(object) if clean_tags(object.tags) then return end

local place = object.tags.place
if place == 'city' or place == 'town' or place == 'village' or place == 'hamlet' or place == 'borough' or place == 'suburb' or place == 'quarter' or place == 'neighbourhood' then
  tables.place:add_row({ tags = object.tags })
else
  tables.point:add_row({ tags = object.tags })
end

end

so places end up in the place table and not in the points. If diffs are processed, will that work correctly? So f.e. if the place-tag is deleted from a point, will it be deleted from my place table and inserted into the point table? (I mean: the add_row() implies that only additions will be done through the process_node function...)