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Date: Fri, 24 Feb 2006 08:31:30 -0500
From: "Michael D. Curtin" <mike@curtin.com>
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To: java-user@lucene.apache.org
Subject: Re: Question to Lucene Index
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Thomas Papke wrote:

> What is the disadvantage of doing that?

Besides being a bit awkward, it could use more RAM and time to compile 
queries.  That could be because a query like "foo*" gets expanded into all the 
terms from the index that begin with "foo", ORed together, like so:

"foo" OR "food" OR "fool" OR "foot" ...

I suppose it's theoretically possible that if you have millions of unique 
terms that all begin with the same thing and then use that common prefix as a 
query, you could notice.  I haven't noticed anything at all in my application, 
which has a few million documents and ~10 million unique terms.

In other words, in practical situations I doubt there are any disadvantages.

--MDC

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