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From Jan Lehnardt <...@apache.org>
Subject Re: Removing MOVE
Date Tue, 17 Mar 2009 11:58:46 GMT

On 17 Mar 2009, at 12:37, Noah Slater wrote:

> On Tue, Mar 17, 2009 at 12:20:42PM +0100, Jan Lehnardt wrote:
>> Hi dev@,
>>
>> CouchDB supports the HTTP method MOVE to move a
>> document to a new document id within a database. MOVE
>> is really just a convenience method for COPY & DELETE.
>> In fact internally, it does just that. Damien says the COPY &
>> DELETE that MOVE does under the hood is not atomic on a
>> single node. And it is hard to support in the multi-node setup.
>
> So, it's provided as a user convenience feature at no cost co CouchDB.
>

>> Hence, I propose to remove the MOVE feature. A client
>> can simply do COPY & DELETE to achieve the same
>> result (modulo having a concurrent change to the source
>> doc between the COPY and the DELETE which should
>> be taken care of by the application anyway).
>
> And you're proposing to remove this useful feature for what reason?  
> Heh.


the feature doesn't work as advertised and creates false expectations
about atomicity of operations.

Cheers
Jan
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