[jira] [Commented] (LUCENE-2605) queryparser parses on whitespace

["John Berryman (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LUCENE-2605?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13292620#comment-13292620 ] 

John Berryman commented on LUCENE-2605:
---------------------------------------

subscribed - Current client has index full of clothing - a search for "dress shoes" will return results containing womens' dresses and running shoes.
                
> queryparser parses on whitespace
> --------------------------------
>
>                 Key: LUCENE-2605
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2605
>             Project: Lucene - Java
>          Issue Type: Bug
>          Components: core/queryparser
>            Reporter: Robert Muir
>             Fix For: 4.1
>
>
> The queryparser parses input on whitespace, and sends each whitespace separated term to its own independent token stream.
> This breaks the following at query-time, because they can't see across whitespace boundaries:
> * n-gram analysis
> * shingles 
> * synonyms (especially multi-word for whitespace-separated languages)
> * languages where a 'word' can contain whitespace (e.g. vietnamese)
> Its also rather unexpected, as users think their charfilters/tokenizers/tokenfilters will do the same thing at index and querytime, but
> in many cases they can't. Instead, preferably the queryparser would parse around only real 'operators'.

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