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From "Helen Warren (JIRA)" <>
Subject [jira] Updated: (LUCENE-538) Using WildcardQuery with MultiSearcher, and Boolean MUST_NOT clause
Date Tue, 04 Apr 2006 10:33:43 GMT
     [ ]

Helen Warren updated LUCENE-538:


Suite of Junit tests illustrating the problem described in this issue.

> Using WildcardQuery with MultiSearcher, and Boolean MUST_NOT clause
> -------------------------------------------------------------------
>          Key: LUCENE-538
>          URL:
>      Project: Lucene - Java
>         Type: Bug

>   Components: Search
>     Versions: 1.9
>  Environment: Ubuntu Linux, java version 1.5.0_04
>     Reporter: Helen Warren
>  Attachments:
> We are searching across multiple indices using a MultiSearcher. There seems to be a problem
when we use a WildcardQuery to exclude documents from the result set. I attach a set of unit
tests illustrating the problem.
> In these tests, we have two indices. Each index contains a set of documents with fields
for 'title',  'section' and 'index'. The final aim is to do a keyword search, across both
indices, on the title field and be able to exclude documents from certain sections (and their
subsections) using a
> WildcardQuery on the section field.
>  e.g. return documents from both indices which have the string 'xyzpqr' in their title
but which do not lie
>  in the news section or its subsections (section = /news/*).
> The first unit test (testExcludeSectionsWildCard) fails trying to do this.
>  If we relax any of the constraints made above, tests pass:
> * Don't use WildcardQuery, but pass in the news section and it's child section to exclude
explicitly (testExcludeSectionsExplicit)</li>
> * Exclude results from just one section, not it's children too i.e. don't use WildcardQuery(testExcludeSingleSection)</li>
> * Do use WildcardQuery, and exclude a section and its children, but just use one index
thereby using the simple
>    IndexReader and IndexSearcher objects (testExcludeSectionsOneIndex).
> * Try the boolean MUST clause rather than MUST_NOT using the WildcardQuery i.e. only
include results from the /news/ section
>    and its children.

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