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From "Robert Muir (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-2262) QueryParser should now allow leading '?' wildcards
Date Sun, 14 Feb 2010 01:18:27 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-2262?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12833485#action_12833485
] 

Robert Muir commented on LUCENE-2262:
-------------------------------------

bq. It doesn't seem like this type of bug is not one that people would rely on (throwing an
exception for ? but not for *

yonik, that's not what this issue is about. have you looked at the patch?

> 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, LUCENE-2262_backwards.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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