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From "Nils Breunese (JIRA)" <>
Subject [jira] Created: (COUCHDB-415) View sorting
Date Thu, 16 Jul 2009 08:29:15 GMT
View sorting

                 Key: COUCHDB-415
             Project: CouchDB
          Issue Type: Wish
    Affects Versions: 0.9
            Reporter: Nils Breunese

I'd like to be able to sort the output of a view. I have a view that generates a list of event
objects with start and end timestamps (and some other data). I emit this data using the end
timestamp as the key, because that is what I want to use for my ?startkey=... query. But I'd
like the results to be sorted by the start timestamp. I understand this is not currently possible
using regular CouchDB views.

The CouchDB Users mailinglist suggested to use couchdb-lucene, as that does offer the option
to sort on any indexed field. I'm trying that route now, but it feels like overkill to add
a full-text indexer to CouchDB just to be able to sort the output of my view.

Some soundbites from the IRC channel when I brought this up:

<rnewson> breun: jan___: in this case the data to sort on is known at map time, so an
extension to emit to support multiple keys (with separate btrees) would do it. not sure how
much effort that is, though.
<rnewson> sorting at query time feels infeasible.

<jan____> rnewson: I think davisp had something like that working back in the day. i.e.
alternate sort oder. davisp?

<rnewson> jan___: I missed that, but it sounds reasonable at emit time.

<davisp> I think its this one:

I would love to have view sorting native in CouchDB.

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