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From Robert Newson <>
Subject Re: A permanent view for user-entered query with complex boolean expressions?
Date Tue, 10 Feb 2009 20:45:45 GMT
>>So, for example "trials where
>>(parameters['parameter1'] == 10 AND parameters['parameter2'] >= 42)"

Whether this can be accomplished inside CouchDB or not, it should be
possible to do inside a Lucene index based off CouchDB data. I don't
currently do the right thing for numbers in range queries, but when I
fix that this kind of query should return _id,_rev pairs;

../dbname/_fti?q=parameter1:10 AND parameter2:[0 TO 42]

the current issue (for my code) is that 0 to 42 is evaluated
lexicographically, which is wrong. I have a planned fix but no time
this week to commit it. It'll appear at when it does.

I expect the query to evaluate very quickly, even when you change the
start and end points (in fact my approach expects you to re-query with
different points).


On Tue, Feb 10, 2009 at 3:34 PM, Chris Anderson <> wrote:
> On Tue, Feb 10, 2009 at 12:09 PM, Paul Davis
> <> wrote:
>> Trunk has support for streaming writes when a Content-Length header is
>> present. Chris Anderson was just working the other day on streaming
>> writes to disk in the absence of a Content-Length header. That
>> basically means that if your HTTP client sends a content-length
>> header, the sky's the limit. If you don't send a Content-Length
>> header, you'll be limited by the available RAM on the machine running
>> CouchDB until Chris finishes his patch.
> Just to clear up, currently attachment PUTs without Content-Length
> headers are rejected. I think that we fixed the RAM buffering issue
> after all:
> (fixed)
> So if you know the length of the attachment, PUT should work for you
> no matter how big it is.
> --
> Chris Anderson

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