On 1 Nov 2005, at 08:17, Michael D. Curtin wrote:
tcorbet wrote:
I have an index over the titles to .mp3 songs.
It is not unreasonable for the user to want to
see the results from: "Show me Everything".
I understand that title:* is not a valid wildcard query.
I understand that title:[a* TO z*] is a valid wildcard query.
What I cannot understand is this behavior which
throws no exceptions:
title:[a* TO z*] returns 0 hits.
title [a* TO m*] OR [n* TO z*] returns *almost* the
correct answer -- one title [of approximately 1200] is missing.
title:[a* TO m*] OR [m* TO z*] correctly returns
all the available titles.
What I have done in a case like this is short-circuit the search
for an empty query and just read the documents out of the index, in
order. That is, I don't really run a search in this case. It's
only a few lines of extra code, and you don't have to retrieve
every document in the index until you need them. Using a
workaround query as in your example causes Lucene to examine every
document in the index before returning you any. Good luck!
In the trunk of Lucene's codebase (and in the upcoming 1.9/2.0
releases), there is a new MatchAllDocsQuery. Just FYI.
Erik
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