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Date: Sat, 13 Feb 2010 19:34:28 +0000 (UTC)
From: "Robert Muir (JIRA)" <jira@apache.org>
To: java-dev@lucene.apache.org
Subject: [jira] Updated: (LUCENE-2262) QueryParser should now allow leading
 '?' wildcards
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     [ https://issues.apache.org/jira/browse/LUCENE-2262?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Robert Muir updated LUCENE-2262:
--------------------------------

    Attachment: LUCENE-2262.patch

initial patch:
* doesnt throw the exception for leading ? when matchVersion >= 3.1
* contrib's queryparser doesnt use Version, so i simply change AllowLeadingWildcardProcessor
* the backwards tests will fail because LUCENE-2248: TestQueryParser uses LUCENE_CURRENT when it should really be using some constant that resolves to LUCENE_30: we can fix the test to use LUCENE_30 instead of LUCENE_CURRENT

> QueryParser should now allow leading '?' wildcards
> --------------------------------------------------
>
>                 Key: LUCENE-2262
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2262
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: QueryParser
>    Affects Versions: Flex Branch
>            Reporter: Robert Muir
>            Assignee: Robert Muir
>            Priority: Minor
>             Fix For: Flex Branch
>
>         Attachments: LUCENE-2262.patch
>
>
> QueryParser currently throws an exception if a wildcard term begins with the ? operator.
> The docs say this:
> {noformat}
> When set, * or ? are allowed as the first character of a PrefixQuery and WildcardQuery.
> Note that this can produce very slow queries on big indexes. 
> {noformat}
> In the flex branch, this is no longer true. foo?, ?foo, f?oo, these are all the same from a performance perspective.

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