Abnormal behavior in QueryParser

["Zhang, Lisheng" <Li...@broadvision.com>]

Hi,

We recently encountered a strange behavior in
lucene v1.4.3 QueryParser: we call

 QueryParser.parse("-1", "myidfield", new StandardAnalyzer());

and get retured query as:

 -myidfield:1  // apparently we want "myidfield:-1"

Currently we can use TermQuery to avoid QueryParser
to bypass this problem, but still we would like to know
if this is a known problem or already fixed in later version?

Thanks very much for helps, Lisheng

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Re: Abnormal behavior in QueryParser

[Erik Hatcher <er...@ehatchersolutions.com>]

On Oct 7, 2005, at 8:14 PM, Zhang, Lisheng wrote:
> We recently encountered a strange behavior in
> lucene v1.4.3 QueryParser: we call
>
>  QueryParser.parse("-1", "myidfield", new StandardAnalyzer());
>
> and get retured query as:
>
>  -myidfield:1  // apparently we want "myidfield:-1"
>
> Currently we can use TermQuery to avoid QueryParser
> to bypass this problem, but still we would like to know
> if this is a known problem or already fixed in later version?

This behavior is entirely by design.  The - and + operators are for  
prohibiting and requiring clauses, as an integral part of the query  
expression language.  The - can be escaped as in "\-1", though maybe  
QueryParser is not appropriate for your situation.

     Erik


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