[Tile-serving] [osm2pgsql] Geometric column for relations (#116)

[cquest]

Maintaining bbox geometries on all relations will hit performances on updates.

Why not add some TRIGGER to maintain some additional table you may need only on the relations you're planning to use ?

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Reply to this email directly or view it on GitHub:
https://github.com/openstreetmap/osm2pgsql/issues/116#issuecomment-32209754
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