check:
https://issues.apache.org/jira/browse/LUCENE-1387
On Oct 20, 2008, at 6:56 PM, xibin wrote:
Thanks for the reply.
Let's say that I have a location code field in the document. Say
there are
2000 indexed documents that have various location codes. When a user
searches, she specifies her own location, as well as the maximum
radius that
she wants the distance to be, in addition to other search fields
that she
may specify.
In order to satisfy this scenario, I am thinking about performing
the search
using all the other fields normally, but use a distance to dynamically
filter out unwanted results. This way the distance calculation
performs
filtering, and the relevancy from other search fields does not
change...
Let me know if this makes sense to you.
Thanks
Xibin
ryantxu wrote:
I don't quite follow what you are trying to do....
can you give a concrete example?
What is missing from the Filter side?
if you need to modify the lucene Query, a custom SearchComponent is
the way to go...
On Oct 20, 2008, at 6:13 PM, xibin wrote:
Hi -
I have done some searching and haven't found what I was looking for.
I hope
this has not been discussed in the forum already.
This is a question as well as looking for design ideas.
I need the ability to dynamically filter out search results as they
are
being collected. The logic that I am developing cannot be statically
applied
at indexing time, so the data is NOT available in the indexed form.
It can
be derived/calculated using one or more of the indexed fields, and
it's
different for each query. The purpose of this "derived field" is to
eliminate resulting indexes so only a subset is considered. This is
very
similar to the Filter concept already in the
SolrIndexSearcher.QueryCommand.
The difference is that I can't write a Lucene Query to obtain the
subset of
indices, I need to implement an algorithm involving using some of
the fields
in the documents.
What I had in mind is the concept of a DyamicFilter. A DynamicFilter
can be
used in the HitCollectors (in SolrIndexSearcher) to perform dynamic
filtering as results are being collected. DynamicFilters would be
added into
the SolrSearchIndexer.QueryCommand class so they can be called
during
collecting time. I considered writing a SearchComponent or a
RequestHandler,
and they seem to be a little bit off for the timing that I needed.
The parameters to construct my DynamicFilters are passed in from
http query
params. I could pick them up and create the DynamicFilters in the
QueryComponent as it creates a QueryCommand. The QueryCommand will
then use
it during Hit Collection in SolrIndexSearcher.
I hope this captures the detail of what I am trying to do. I am
looking for
validation/alternative suggestions from an insider (yonik?). I feel
bad
having to do the intrusive modification here, and am open for
suggestions. I
would be interested in contributing this work if it turns out to be
valuable.
Thanks for reading.
Xibin
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