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List:       lucene-dev
Subject:    Re: Wildcard Prefix
From:       Brian Goetz <brian () quiotix ! com>
Date:       2004-06-16 8:52:34
Message-ID: 40D00A52.9000502 () quiotix ! com
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> WildcardQuery (via the API, not QueryParser) allows '*ucene' syntax.
>
> Why doesn't QueryParser allow this?  Because it is a very inefficient 
> and potentially performance killing type of query.  Lucene must 
> navigate *every* term in the index in order to find what matches. 


More specifically, QueryParser is often used in applications where the 
query string will have been typed into a web form by a user.  You don't 
want a naive user (or a typo) to take down your application.)  Queries 
constructed by by the query API are less likely to be "accidental."



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