[Tile-serving] [osm2pgsql-dev/osm2pgsql] Error in reprocessing of ways in relation, if osmc_symbols-tag of the relation contains the word 'backslash' (Issue #2128)

[Jochen Topf]

As @pnorman mentioned the problem is in your Lua script. You make no attempt to escape/format the value correctly. The reason why this fails here and not somewhere else is probably the backslash in the tag (which also needs to be corrected in the OSM data, but that's beside the point here). Because you are using `sql_type` you have to convert the data you have somehow into the correct format for PostgreSQL to understand. Osm2pgsql can not do this for you, because it doesn't interpret the `sql_type` at all but just gives the data "as is" to the database and hopes that the database can interpret it according to the type you defined in `sql_type`.

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