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Date: Mon, 16 May 2011 11:35:05 -0400
Message-ID: <BANLkTinjW0WbXWbfj0LmPrNHZ5vb2oTrNQ@mail.gmail.com>
Subject: Re: convert data query into map/reduce function
From: Sean Copenhaver <sean.copenhaver@gmail.com>
To: user@couchdb.apache.org
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Usually the convention is you have some kind of 'type' attribute (so type
checking) on your documents or you check that all the fields you are
interested in exist (more of the duck approach) in your map function. So
perhaps your map function is something like:

function(doc){
    if (doc.type !=3D 'line_item') return;

    var value =3D {


    emit([doc.l_shipdate, doc.l_returnflag, doc.l_linestate], {
}

On Mon, May 16, 2011 at 11:06 AM, Mauro Fagnoni <mauro.fagnoni@gmail.com>wr=
ote:

> Stefan I'm trying to convert this sql query in an identical to the docume=
nt
> I created in couchdb. Unfortunately, it is the first time using this
> database and would like to understand how to translate the query using on=
ly
> the wiki because I have not figured out how to do a lot
>
> 2011/5/16 Stefan Matheis <matheis.stefan@googlemail.com>
>
> > i think a short example would be really helpful .. especially related
> > to your data-structure .. and the expected behaviour. do you already
> > have an reduce function, but it does not work like you'd have it to?
> >
>
>
>
> --
> -----------------------------------------------
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--=20
=93The limits of language are the limits of one's world. =93 -Ludwig von
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