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From Erik Hatcher <e...@ehatchersolutions.com>
Subject Re: filtering on searching or after through hits?
Date Tue, 26 Jul 2005 11:56:24 GMT

On Jul 26, 2005, at 3:15 AM, Paul Libbrecht wrote:

> But filters are in-memory biests so have to be recomputed every- 
> time... what would be the best approach:
> - store the filter (that shouldn't be very expensive but I never  
> tried)
> - modify the index to add a flag ?
> Say, for now, my filter contains 70% of the documents.

Could you frame your questions around a use case?

A filter is really designed for long-term use, not for instantiation  
for every search.

     Erik


>
> thanks
>
> paul
>
>
> Le 25 juil. 05, à 18:40, Riccardo Daviddi a écrit :
>
>
>> ok:)
>> so I do this "filtering" on the hits.
>> thx
>>
>> On 7/25/05, Erik Hatcher <erik@ehatchersolutions.com> wrote:
>>
>>>
>>> On Jul 25, 2005, at 7:05 AM, Riccardo Daviddi wrote:
>>>
>>>> Hi all,
>>>> I have to filter my searching in two ways:
>>>> 1) by score, I want that only docs with score higher than a  
>>>> threshold
>>>> are returned.
>>>> 2) by num of docs, I want that only, for example, the first 20 docs
>>>> are returned.
>>>>
>>>> It's better do it with a queryfilter or search for all and after  
>>>> look
>>>> through the hits with some conditions?
>>>>
>>>
>>> A QueryFilter can do neither of these criteria.  I recommend simply
>>> doing a search and limiting the Hits shown based on the desired
>>> criteria.
>>>
>>>      Erik
>>>
>>>
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>>>
>>
>>
>> -- 
>> Riccardo Daviddi
>>
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>>
>
>
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