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From "Erick Erickson (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (LUCENE-1122) queryparser whitespace escaping and documentation?
Date Sun, 10 Mar 2013 13:27:13 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-1122?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Erick Erickson resolved LUCENE-1122.
------------------------------------

    Resolution: Won't Fix

SPRING_CLEANING_2013 We can reopen if necessary.
                
> queryparser whitespace escaping and documentation?
> --------------------------------------------------
>
>                 Key: LUCENE-1122
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1122
>             Project: Lucene - Core
>          Issue Type: Improvement
>          Components: core/queryparser, general/website
>            Reporter: Hoss Man
>            Priority: Minor
>
> as noted in this solr thread...
> http://www.nabble.com/PhraseQuery-and-WildcardQuery-to14503609.html#a14503609
> ...it's possible to escape a whitespace character in the value of a term or prefix query
by using a backslash so that the QueryParser will not treat it as "special" (ie: won't split
on it when dividing the input into chunks for analysis).
> at a minimum, this should be noted here...
> http://lucene.apache.org/java/docs/queryparsersyntax.html#Escaping%20Special%20Characters
> ...but it got me wondering...
>    * is this a side effect of something else, or will QueryParser really respect this
everywhere? even in field names? (i haven't tested) ... i think this is a result of QueryParser
allowing you to escape any character even if it isn't "special" to the syntax
>    * shouldn't a space be considered "special" since it does trigger certain behavior?
... so shouldn't QueryParser.escape(String) escape spaces as well as the other special characters?

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