Ivan Erceg created COUCHDB-2190:
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Summary: Allow "skip" to be negative
Key: COUCHDB-2190
URL: https://issues.apache.org/jira/browse/COUCHDB-2190
Project: CouchDB
Issue Type: Improvement
Security Level: public (Regular issues)
Components: HTTP Interface
Reporter: Ivan Erceg
I propose to allow "skip" to be a negative value in order to minimise the
number of requests and/or the amount of data that has to be retrieved.
An example: I have a key for a reduce and I want to find the next and the
previous keys in a single request. If "skip" was allowed to be negative I could
make a query with skip -1 and limit +3 thus retrieving the previous, the
current and the next keys. I for one can't think of an alternative solution
(though I'm a relative newbie in CouchDb) that would allow to do this in a
single request.
Considering how skip works (if I understand it correctly), there shouldn't be
any technical impediment to search the B-tree for the given key, take one (or
more) steps back (in the same way we take them forward for skip > 0) and then
retrieve the data from there.
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