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Posted to dev@lucene.apache.org by "Yonik Seeley (JIRA)" <ji...@apache.org> on 2005/10/03 22:11:48 UTC
[jira] Commented: (LUCENE-395) CoordConstrainedBooleanQuery + QueryParser support
[ http://issues.apache.org/jira/browse/LUCENE-395?page=comments#action_12331216 ]
Yonik Seeley commented on LUCENE-395:
-------------------------------------
> if there is only one optional clause, and minNrShouldMatch==1 ... should it be treated as if it's required
That would be my vote... it requires less special case checking when generating queries.
> if/when clients set the minNrShouldMatch to be a value higher then the number of optional clauses
Either treat all optional clauses as required, or don't match any clauses. I guess I would lean toward being literal and not match anything.
> CoordConstrainedBooleanQuery + QueryParser support
> --------------------------------------------------
>
> Key: LUCENE-395
> URL: http://issues.apache.org/jira/browse/LUCENE-395
> Project: Lucene - Java
> Type: Improvement
> Components: Search
> Versions: unspecified
> Environment: Operating System: other
> Platform: Other
> Reporter: Mark Harwood
> Assignee: Lucene Developers
> Priority: Minor
> Attachments: CoordConstrainedBooleanQuery.java, CoordConstrainedBooleanQuery.java, CustomQueryParserExample.java, CustomQueryParserExample.java, LUCENE-395.patch, LUCENE-395.patch, TestBooleanMinShouldMatch.java, TestBooleanMinShouldMatch.java
>
> Attached 2 new classes:
> 1) CoordConstrainedBooleanQuery
> A boolean query that only matches if a specified number of the contained clauses
> match. An example use might be a query that returns a list of books where ANY 2
> people from a list of people were co-authors, eg:
> "Lucene In Action" would match ("Erik Hatcher" "Otis Gospodnetić" "Mark Harwood"
> "Doug Cutting") with a minRequiredOverlap of 2 because Otis and Erik wrote that.
> The book "Java Development with Ant" would not match because only 1 element in
> the list (Erik) was selected.
> 2) CustomQueryParserExample
> A customised QueryParser that allows definition of
> CoordConstrainedBooleanQueries. The solution (mis)uses fieldnames to pass
> parameters to the custom query.
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