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https://issues.apache.org/jira/browse/LUCENE-3451?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13113960#comment-13113960
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Michael McCandless commented on LUCENE-3451:
--------------------------------------------
Patch looks great Uwe!
Nice catch on the analyzers removing stop words and then making an all MUST_NOT
BQ. But, I think we should throw an exception in this case, since it's a
horrible trap now? User will get 0 results but that's flat out silently wrong?
> Remove special handling of pure negative Filters in BooleanFilter, disallow
> pure negative queries in BooleanQuery
> -----------------------------------------------------------------------------------------------------------------
>
> Key: LUCENE-3451
> URL: https://issues.apache.org/jira/browse/LUCENE-3451
> Project: Lucene - Java
> Issue Type: Bug
> Reporter: Uwe Schindler
> Assignee: Uwe Schindler
> Fix For: 4.0
>
> Attachments: LUCENE-3451.patch, LUCENE-3451.patch, LUCENE-3451.patch
>
>
> We should at least in Lucene 4.0 remove the hack in BooleanFilter that allows
> pure negative Filter clauses. This is not supported by BooleanQuery and
> confuses users (I think that's the problem in LUCENE-3450).
> The hack is buggy, as it does not respect deleted documents and returns them
> in its DocIdSet.
> Also we should think about disallowing pure-negative Queries at all and throw
> UOE.
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