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

[Paul Norman]

> To implement the change file behaviour, we would need to introduce an index over the osm_ids on the output tables

This would be a bad idea to do by default, since it would add unneeded bloat to output. Checking if there's an existing btree (osm_id) index would be difficult

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Reply to this email directly or view it on GitHub:
https://github.com/openstreetmap/osm2pgsql/issues/213#issuecomment-122515024
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