Mailing List Archive: RE: Queryparser croaking on "[" and "]"

On the developer list someone recently asked if special query characters should be escapable and I think this problem demonstrates that they should. So if you want to search for the literals [ and ] in a query like String[] you could escape them with the possibly a backslash so the query would be formatted as String\[\].

-----Original Message-----
From: Scott Ganyo [mailto:scott.ganyo@eTapestry.com]
Sent: Wednesday, February 20, 2002 2:58 PM
To: 'Lucene Users List'
Subject: RE: Queryparser croaking on "[" and "]"

Actually, [] denotes an inclusive range of Terms. Anyway, why not change
the syntax if this is bad...?

Scott

> -----Original Message-----
> From: Brian Goetz [mailto:brian@quiotix.com]
> Sent: Wednesday, February 20, 2002 10:08 AM
> To: Lucene Users List
> Subject: Re: Queryparser croaking on "[" and "]"
>
>
> This is because the query parser uses [] to denote ranges of numbers.
> (I always thought this was a bad choice of syntax for exactly this
> reason.)
>
>
> On Wed, Feb 20, 2002 at 11:14:05AM -0000, Les Hughes wrote:
> > Hi,
> >
> > I'm currently building a small app that allows searching of
> Java sourcecode.
> > The problem I'm getting is when parsing a query string that
> contains an
> > array specifier (ie. String[] or int[][]) the query parser
> seem to croak
> > with a
> >
> > Lexical error at line XX, column XX. Encountered: after : "[]"
> >
> >
> > So what am I doing wrong / what should I write to fix this?
> >
> >
> > Les
> >
> >
> > --
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Hi all,

Well, I've had a look at QueryParser.jj and not being familiar with javacc
etc I can now safey say I'm a bit brain-fried.

Having thought more about it, it would be cool to be able to escape any of
the "special" chars - []{}() etc. Someone care to point me in the right
direction and I'll have a go.

Rgds,

Les

> -----Original Message-----
> From: Shockey, Sam [mailto:Sam.Shockey@divine.com]
> Sent: 20 February 2002 21:49
> To: Lucene Users List; lucene-dev@jakarta.apache.org
> Subject: RE: Queryparser croaking on "[" and "]"
>
>
> On the developer list someone recently asked if special query
> characters should be escapable and I think this problem
> demonstrates that they should. So if you want to search for
> the literals [ and ] in a query like String[] you could
> escape them with the possibly a backslash so the query would
> be formatted as String\[\].
>
>
> -----Original Message-----
> From: Scott Ganyo [mailto:scott.ganyo@eTapestry.com]
> Sent: Wednesday, February 20, 2002 2:58 PM
> To: 'Lucene Users List'
> Subject: RE: Queryparser croaking on "[" and "]"
>
>
> Actually, [] denotes an inclusive range of Terms. Anyway,
> why not change
> the syntax if this is bad...?
>
> Scott
>
> > -----Original Message-----
> > From: Brian Goetz [mailto:brian@quiotix.com]
> > Sent: Wednesday, February 20, 2002 10:08 AM
> > To: Lucene Users List
> > Subject: Re: Queryparser croaking on "[" and "]"
> >
> >
> > This is because the query parser uses [] to denote ranges
> of numbers.
> > (I always thought this was a bad choice of syntax for exactly this
> > reason.)
> >
> >
> > On Wed, Feb 20, 2002 at 11:14:05AM -0000, Les Hughes wrote:
> > > Hi,
> > >
> > > I'm currently building a small app that allows searching of
> > Java sourcecode.
> > > The problem I'm getting is when parsing a query string that
> > contains an
> > > array specifier (ie. String[] or int[][]) the query parser
> > seem to croak
> > > with a
> > >
> > > Lexical error at line XX, column XX. Encountered: after : "[]"
> > >
> > >
> > > So what am I doing wrong / what should I write to fix this?
> > >
> > >
> > > Les
> > >

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