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From "Robert Muir (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-4024) FuzzyQuery should never do edit distance > 2
Date Mon, 07 May 2012 20:42:50 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-4024?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13269981#comment-13269981
] 

Robert Muir commented on LUCENE-4024:
-------------------------------------

{quote}
Should there be a separate issue to update doc for the query parser(s) beyond Lucene (I see
that Lucene Query Parser is updated)?
{quote}

All queryparsers were updated. But ClassicQueryParser (the lucene one) is the only one that
really 
documents its syntax though, so thats where the doc update occurred.

The rest of the QPs mostly re-use ClassicQueryParser's syntax and don't document any different
syntax.

Seriously (unrelated) if you have javadocs for that queryparser module, in general (especially
classes with no javadocs at all!!!!) just throw them up whereever, email list, this issue,
some new issue, I dont care. Ill commit them.

                
> FuzzyQuery should never do edit distance > 2
> --------------------------------------------
>
>                 Key: LUCENE-4024
>                 URL: https://issues.apache.org/jira/browse/LUCENE-4024
>             Project: Lucene - Java
>          Issue Type: Improvement
>            Reporter: Michael McCandless
>             Fix For: 4.0
>
>         Attachments: LUCENE-4024.patch
>
>
> Edit distance 1 and 2 are now very very fast compared to 3.x (100X-200X faster) ... but
edit distance 3 will fallback to the super-slow scan all terms in 3.x, which is not graceful
degradation.
> Not sure how to fix it ... mabye we have a SlowFuzzyQuery?  And FuzzyQuery throws exc
if you try to ask it to be slow?  Or, we add boolean (off by default) that you must turn on
to allow slow one..?

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