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https://issues.apache.org/jira/browse/LUCENE-3451?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Uwe Schindler updated LUCENE-3451:
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Attachment: LUCENE-3451.patch
Attached a patch with some changes in the BooleanQuery prohibited-only
detection and all failing tests fixed:
- TestBoolean2 had a explicit prohibited-only query -> changed to assert the UOE
- TestBoolean2 had a random BQ generator. Fixed this generator to not create
prohibited-only queries
- in TestComplexExplanations* the prohibited-only fake clauses were removed
- MemoryIndexTest used a list of lots of query-strings, some of them looking
like that : "a -b". If the test had randomly choosen a MockTokenizer with
english stopwords -> peng. Removed that Analyzer
The last example is one problem of the explicit UOE: Now a user can suddenly
get UOE if he uses a query where e.g. all positive clauses are stopwords - ok,
users were always confused about that. Any comments about that?
> 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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