[Tile-serving] [openstreetmap/osm2pgsql] Does the -G option support MultiPoint and MultiLineString geometries? (#609)

[Paul Norman]

> I can't create primary keys on the highways due to osm_id duplicates.

The rendering tables do not have a unique or primary key by design. -G will not change that, nor is it supposed to.

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> Are there any plans to do so in the future?

They couldn't be in the C transforms. It would mean extending the Lua interface to have another return for if an object is supposed to be transformed into a Multi geometry type or not, as well as probably another return for what distance to split linestrings on.

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