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From Edwin Tang <emtt...@yahoo.com>
Subject Re: Need help with filtering
Date Mon, 22 Nov 2004 18:34:17 GMT
Hello again,

I've modified DateFilter to filter out document IDs as suggested. All seems to
be running well until I tried a specific test case. All my documents have IDs
in the 400,000 range. If I set my lower limit to 5, nothing comes back. After
examining the code, I found the issue to be at the following line:
TermEnum enumerator = reader.terms(new Term(field, start));

Is there a way to retrieve a set of documents with IDs using a Integer
comparison versus a String comparison? If I set "start" to 0, I get everything,
but that's not very efficient.

Thanks in advance,
Ed

--- Paul Elschot <paul.elschot@xs4all.nl> wrote:

> On Wednesday 17 November 2004 01:20, Edwin Tang wrote:
> > Hello,
> > 
> > I have been using DateFilter to limit my search results to a certain date
> > range. I am now asked to replace this filter with one where my search 
> results
> > have document IDs greater than a given document ID. This document ID is
> > assigned during indexing and is a Keyword field.
> > 
> > I've browsed around the FAQs and archives and see that I can either use
> > QueryFilter or BooleanQuery. I've tried both approaches to limit the 
> document
> > ID range, but am getting the BooleanQuery.TooManyClauses exception in both
> > cases. I've also tried bumping max number of clauses via 
> setMaxClauseCount(),
> > but that number has gotten pretty big.
> > 
> > Is there another approach to this? ...
> 
> Recoding DateFilter to a DocumentIdFilter should be straightforward.
> 
> The trick is to use only one document enumerator at a time for all
> terms. Document enumerators take buffer space, and that is the
> reason why BooleanQuery has an exception for too many clauses.
> 
> Regards,
> Paul
> 
> 
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