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From "Yonik Seeley (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-2262) QueryParser should now allow leading '?' wildcards
Date Sun, 14 Feb 2010 03:02:27 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-2262?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12833493#action_12833493
] 

Yonik Seeley commented on LUCENE-2262:
--------------------------------------

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

Nope, I was going by the comments. Looks like I misinterpreted them.  Sorry.

As an aside: In solr-land I encourage adding API examples, etc, to lower the bar for giving
feedback (i.e. they don't have to read the patch to give an opinion on what the syntax of
a new request should look like).  That's not a criticism of your description (which was fine)
but rather the implication that I should have read the patch (and I may have misread that
too).

bq. in my opinion disallowing these queries with leading wildcards, be it * or ? or whatever,
is rather silly, since we allow even slower fuzzyqueries by default.

Agree.

> 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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