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From Kiran Ayyagari <kayyag...@apache.org>
Subject Re: (ObjectClass=*) node in filter can be removed
Date Fri, 22 Feb 2013 17:49:29 GMT
On Fri, Feb 22, 2013 at 11:09 PM, Kiran Ayyagari <kayyagari@apache.org>wrote:

>
>
> On Fri, Feb 22, 2013 at 9:43 PM, Emmanuel L├ęcharny <elecharny@gmail.com>wrote:
>
>> Hi guys,
>>
>> as I was playing around the idea of moving the scope index at the end of
>> the filter, nstead of the beginning, I just got some failures when
>> running the tests. For instance, a test that searcj for every entries
>> under ou=system, SUBTREE, with a filter like (ObjectClass=*), it returns
>> 0.
>>
>> Why ?
>>
>> Very simple : as every entry has an ObjectClass, we don't store the list
>> of entries assoiated to the ObjectClass value in the presence index. The
>> direct consequence is that evaluating (&(scope=Subtree)(OjectClass=*))
>> wil return everything using the scope index, when
>> (&(OjectClass=*)(scope=Subtree)) will return nothing as the presence
>> index will be used (and it does not contain ObjectClass).
>>
>> At this point, I realized that we will always use the scope except for a
>> OneLevel scope, and the number of candidates the scope will find will
>> always be equal to the candidates matched by (ObjectClass=*).
>>
>> We then can get rid of the (ObjectClass=*) node in the filter,
>> irrespective to the complexity of this filter.
>>
>> (replying just for the sake of documenting the conversation happened on
> IM)
> this looks like a regression cause we never actually keep this
> (objectClass=*) node,  we drop it before evaluating the filter
> further
>
> I was wrong, we are keeping this node dropping rest of the nodes in
certain cases like
(&(objectClass=person)(objectClass=*)) here clearly we can drop the first
node from  the filter

> --
>> Regards,
>> Cordialement,
>> Emmanuel L├ęcharny
>> www.iktek.com
>>
>>
>
>
> --
> Kiran Ayyagari
> http://keydap.com




-- 
Kiran Ayyagari
http://keydap.com

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