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From "Chris Anderson" <>
Subject Re: flexible filtering needed, with speed.
Date Tue, 19 Aug 2008 04:46:21 GMT
On Mon, Aug 18, 2008 at 8:31 PM, Brad Anderson <> wrote:
> So, I thought, should I be doing this in two steps?  Set up the key to be
> store and whatever else I might want to query on (Month or whatever
> timeframe), and return the doc id's as the values on the original query?  I
> would then send in a complex key to do the filtering.  This would require
> waiting for the _bulk_get functionality, and I'd send that list of ID's into
> a 2nd query to get the raw data to send it to 'map'.

You have dynamic queries, so unless you can use couchdb to build an
index that works for your queries... maybe emitting each key-value
pair from your documents, like:

var keys = [];
for (key in doc) keys.push(key);
for (key in doc) {
  emit([key, doc[key]], keys);

This will give you a sorted index of each key/value pair you deal
with. So for example, if the user is searching by "city" the document
would show up with a value of "Atlanta".

By listing all the document's keys in the value, you can do your
duck-typing from the view value alone without having to load the
document. Only request the documents which have all the necessary

This is a little complex - it's the sort of thing SQL tries to paper
over. So it depends on your application. It might be a better fit for
RDBMS, but there's a lot that can be expressed with CouchDB.

Hope this is helpful.


Chris Anderson

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