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https://issues.apache.org/jira/browse/LUCENE-4748?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael McCandless updated LUCENE-4748:
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Attachment: LUCENE-4748.patch
Thanks Shai, I fixed those issues.
For the first TODO, I removed the comment: I think an app should not make a
DDQ, and no drill downs to it, and pass it to DS.
For the 2nd TODO, I fixed it so the "pure browse" works, but I put another TODO
to improve the implementation later ...
> Add DrillSideways helper class to Lucene facets module
> ------------------------------------------------------
>
> Key: LUCENE-4748
> URL: https://issues.apache.org/jira/browse/LUCENE-4748
> Project: Lucene - Core
> Issue Type: Improvement
> Components: modules/facet
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Fix For: 4.2, 5.0
>
> Attachments: DrillSideways-alternative.tar.gz, LUCENE-4748.patch,
> LUCENE-4748.patch, LUCENE-4748.patch, LUCENE-4748.patch, LUCENE-4748.patch,
> LUCENE-4748.patch, LUCENE-4748.patch, LUCENE-4748.patch, LUCENE-4748.patch,
> LUCENE-4748.patch
>
>
> This came out of a discussion on the java-user list with subject
> "Faceted search in OR": http://markmail.org/thread/jmnq6z2x7ayzci5k
> The basic idea is to count "near misses" during collection, ie
> documents that matched the main query and also all except one of the
> drill down filters.
> Drill sideways makes for a very nice faceted search UI because you
> don't "lose" the facet counts after drilling in. Eg maybe you do a
> search for "cameras", and you see facets for the manufacturer, so you
> drill into "Nikon".
> With drill sideways, even after drilling down, you'll still get the
> counts for all the other brands, where each count tells you how many
> hits you'd get if you changed to a different manufacturer.
> This becomes more fun if you add further drill-downs, eg maybe I next drill
> down into Resolution=10 megapixels", and then I can see how many 10
> megapixel cameras all other manufacturers, and what other resolutions
> Nikon cameras offer.
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