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From Balthasar Schopman <lstitc...@gmail.com>
Subject Re: disable boolean operators ?
Date Mon, 07 Jul 2008 16:45:34 GMT
That expains. Thanks a lot!


On Jul 7, 2008, at 6:19 PM, Erick Erickson wrote:
> I think you're off base a little. Lucene defaults to 1,024 boolean  
> clauses
> as the maximum number allowed. There is an implied boolean between
> each term no matter what. Removing OR, AND, NOT doesn't change
> that in the least. That is,
> term1 term2 term3
> is equivalent to
> term1 OR term2 OR term3
>
> So removing the booleans is having no effect on the error. The fact
> that you have over 2,000 terms is the issue.
>
> But you can change the number by BooleanQuery.setMaxClauseCount
>
> Best
> Erick
>
> On Mon, Jul 7, 2008 at 12:04 PM, Balthasar Schopman  
> <lstitchvu@gmail.com>
> wrote:
>
>> Hiya,
>>
>> Is there a way to disable boolean operators in the Lucene engine?
>>
>> The reason for this question is the mystical / unexpected exception I
>> encounter when parsing a query containing many words. I query on a  
>> single
>> field with a query containing 2243 words (14.742 characters). I  
>> haven't had
>> this issue with smaller queries. I remove the Lucene special  
>> characters (+,
>> -, &&, ||, !, (, ), {, }, [, ], ^, \, ~, *, ?, :, \) and boolean  
>> operators
>> (AND, OR, NOT) from string before including them in a query. Then I
>> construct the query as follows:
>> Query q = new QueryParser("alldata", analyser).parse(queryString);
>> and call
>> Hits hits = searcher.search(q);
>>
>> An exception with the following message is thrown:
>> Cannot parse '<big string>': too many boolean clauses
>>
>> Kind regards,
>> Balthasar Schopman
>>
>>
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>>


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