Guys, this needs to run on d...@.

Cheers
Jan
--

On 3 May 2009, at 13:17, Chris Anderson wrote:

On Thu, Apr 30, 2009 at 6:02 PM, kowsik <[email protected]> wrote:
Maybe just a new URL parameter for all views to query by prefix?

_all_docs?prefix="_design/"

'prefix' will need startkey_docid and/or endkey_docid, but could
handle the proper prefix matching without the user having to worry
about what the next character in the collating sequence is.


IMHO the prefix= param is a fine thing for CouchDB to implement. If
anyone has a patch, please share. There may be implementation edge
cases, I haven't really thought it through. Hopefully a patch and a
test case will be all that's needed to ensure that it's done
correctly.

K.

On Thu, Apr 30, 2009 at 5:07 PM, Antony Blakey <[email protected] > wrote:

On 01/05/2009, at 12:49 AM, Wojciech Kaczmarek wrote:

On Thu, Apr 30, 2009 at 16:56, Brian Candler <[email protected]> wrote:

On Thu, Apr 30, 2009 at 02:23:17PM +0100, Brian Candler wrote:

(5) Strangely, doc id keys in _all_docs appear to behave differently; perhaps they are ASCII-compared rather than UCA compared. See script 3
below.

And this has just had me tearing my hair out for the last half hour: a
search for

  _all_docs?startkey="_design/"&endkey="_design/ZZZZ"

did not match some of my documents, e.g. _design/c000. Now I realise that almost certainly this is because Z comes before c in ASCII collation.

Is this intentional behaviour? If so I will change the Wiki so it
recommends

  _all_docs?startkey="_design/"&endkey="_design/~"

Isn't it better to use "\u9999" as the ending marker?


\u9999 isn't the final unicode collation point - firstly that's not the last value in a 16 bit space, secondly unicode isn't 16 bits, and finally,
unicode collation is locale dependent.

I've previously argued that the only way to do this correctly is to allow a
prefix search defined over all JSON values:
http://mail-archives.apache.org/mod_mbox/couchdb-dev/200901.mbox/%[email protected]%3e

Antony Blakey
--------------------------
CTO, Linkuistics Pty Ltd
Ph: 0438 840 787

Only two things are infinite, the universe and human stupidity, and I'm not
sure about the former.
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--
Chris Anderson
http://jchrisa.net
http://couch.io


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