Antony Bowesman wrote:
Hi,
I'm writing a mapping mechanism between an existing search interface and
Lucene and wondered how to support a single NOT/- query.
Given the query "-attribute", then from an ealier comment by Chris
Hostetter where he says "you can't have a negative clause in isolation
by itself", I assume that you first have to create a BooleanClause that
finds everything and then another Clause that removes the "attribute".
Is this right or is there another way to do it?
That's certainly how we do it... a BooleanClause with a
MatchAllDocsQuery as default and the desired prohibited query.
You can subclass QueryParser to make this happen automatically (and I
believe I've posted code about this at least once on the list already.)
Daniel
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Daniel Noll
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