[Tile-serving] [osm2pgsql] middle_ram_t::relations_using_way is unimlpemented (#213)

[Sarah Hoffmann]

The C version actually just appended the new data potentially duplicating everything where the extracts overlap. I'm not sure that's actually what one would expect. I would rather expect that the new pbf is handled like a huge change file with adds only. What do others here think?

Getting the old behaviour back is relatively simple and only requires a small change in the libosmium parser.

To implement the change file behaviour, we would need to introduce an index over the osm_ids on the output tables and remove a few sanity checks. Also possibly add a huge warning that append in non-slim mode might cause potential data loss if actually used with a change file.

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Reply to this email directly or view it on GitHub:
https://github.com/openstreetmap/osm2pgsql/issues/213#issuecomment-122514773
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