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drolbr / Overpass-API

A database engine to query the OpenStreetMap data.
http://overpass-api.de
GNU Affero General Public License v3.0
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Unexpected behavior on recurse up relations (<<) #585

Closed mikkolukas closed 3 years ago

mikkolukas commented 3 years ago

I have added a "Be aware" with testing examples at Overpass_QL#Recurse_uprelations(<<), as I believe we going to live with this behavior:

Done on a node or a way, it will return the parents of that node or way (as expected). Done on a relation, it will return both the relation itself and it's parents. If you want the parents only, you can do: (<<; - rel._;); instead.

This bug cannot be fixed without breaking the now expected functionality of thousands of scripts, but I believe it is important that the developer is made aware of the issue.

Also posted at: Talk:Overpass_turbo#Unexpected_behavior_on_recurse_up_relations__(<<) [wiki.openstreetmap.org]

Was wrongly posted in tyrasd/overpass-turbo/issues/470 [github.com]

mikkolukas commented 3 years ago

Is the observations correct? Is the conclusion correct?