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From Les Fletcher <>
Subject Re: query syntax question
Date Thu, 10 May 2007 19:17:54 GMT
I like the idea of the filter since I am making heavy use of filters for 
this particular query, but how would one go about constructing it 
efficiently at query time?  All I can see is hacking around not being 
able to use the * as the first character.


Erick Erickson wrote:

> You could create a Lucene Filter that had a bit for each document that
> had a first or last name and use that at query time to restrict your
> results appropriately. You could create this at startup time or at
> query time. See CachingWrapperFilter for a way to cache it.
> Another approach would be to add a dummy field to each document,
> something like HASFIRSTORLASTNAME. At index time, when
> you index a document, if it has a first or last name, put "yes" in the
> field. Otherwise, put "no".
> Then, at search time, add an +HASFIRSTORLASTNAME:yes to the
> query......
> You could add as many states to this field as you want.
> Erick
> On 5/10/07, Les Fletcher <> wrote:
>> I have a question about empty fields.  I want to run a query that will
>> search against a few particular fields for the query term but then also
>> also check to see if a two other fields have any value at all.  i.e., I
>> want to search for a set records but don't want to return a record if
>> that record has blank first and last name fields.  Any help would be
>> greatly appreciated.
>> Les
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