couchdb-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Alex P <apede...@kolosy.com>
Subject multiple range queries via POST?
Date Tue, 27 Oct 2009 14:50:31 GMT
i know this is currently unsupported (and may be more of a question for the
dev list), but is there a technical reason while multi-range queries can't
be submitted to couch (slight ah-hah moment at the end)?

the specific problem i'm trying to address is this:

suppose i have a message document, and a corresponding map function:

function (doc) {
  if (doc.docType != 'message') return;

  emit(doc.owner, null);
}

if i wanted to pull back all messages for users foo and bar, i'd simply do a
POST path/to/couch keys = ['foo', 'bar']. now let's make this data come back
sorted by create date:

function (doc) {
  if (doc.docType != 'message') return;

  emit([doc.owner, doc.createDate], null);
}

also cool, but now, to retrieve all messages pertaining to a single user, i
need to do GET path/to/couch startKey=['foo']&endKey=['foo', 'a']. this
works, but it now means that if i want all messages pertaining to both foo
and bar, i need to run two separate queries.

as i'm writing this, i think i'm starting to see that the problem would be
with having to merge overlapping ranges, but i still would like someone else
to weigh in on this


thanks,
alex.

Mime
  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message