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https://issues.apache.org/jira/browse/COUCHDB-415?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12738008#action_12738008
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Paul Joseph Davis commented on COUCHDB-415:
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Just realized that my old patch may not be the entire answer to this. For
reference, the old patch only allows specifying forward or reverse sorting for
array key elements at definition time.
Nils here apparently wants to select a range of rows by endtime and then resort
based on starttime. My patch would only give "sort by end time asc, sort by
startime asc within endtime keys". Think simple Excel sort by multiple columns
type sorting here.
That said, the patch itself isn't too hard.
> View sorting
> ------------
>
> Key: COUCHDB-415
> URL: https://issues.apache.org/jira/browse/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:
> http://github.com/davisp/couchdb-old-patches/tree/view-sort
> ----
> I would love to have view sorting native in CouchDB.
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