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From "Erick Erickson" <>
Subject Re: Strange Behaviour of BooleanQuery?
Date Thu, 08 Feb 2007 13:06:57 GMT
I assume it's a typo, but your for loop wouldn't produce your example as
they'd all be the same field....

But that said, I suspect that your QueryParser is analyzing the tokens you
feed it differently than how they're included when you make your own

So, here's what I'd do. Use Query.toString() for both your BooleanQuery and
the query produced by QueryParser and see what's different, if anything.
That'll certainly give you a clue. If your QueryParser uses, for instance,
the StandardAnalyzer, it'll lowercase, remove most punctuation, etc, which
you wouldn't get with your manually constructed BooleanQuery.

And, of course, get Luke if you haven't gotten a copy already to examine
your index and see the effects of using various analyzers on a query.

Hope this helps

On 2/8/07, Oliver Hummel <> wrote:
> Hi @all,
> I'm a little confused about the behaviour of BooleanQuery. I have a custom
> parser that analyzes some text and constrcuts an "ANDed" BooleanQuery.
> toString
> delivers something like this:
>   (+field1:term1 +field2:term2)
> Looks pretty normal to me, but the problem is it delivers no results
> (although
> there are matching ones of course). What makes it even more confusing is
> the
> fact that when I take the above query and use it with the QueryParser it
> works
> and delivers the expected results...
> Any ideas? Perhaps anyone who is able to reproduce it? Am I doing
> something
> wrong or is there a bug?
> Here is how I produce the BooleanQuery:
> BooleanQuery bq = new BooleanQuery();
> for (iterate over terms) {
>    t = new Term(field, term);
>    bq.add(new TermQuery(t), BooleanClause.Occur.MUST);
> }
> Any help appreciated, thanks in advance!
>   Oliver
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