Xapian discuss - Nov 2010 - How to make QueryParser select entire word like "H.O.T"

Hi,
 
I'm using xapian to build my search engine, but met with a problem.
The code snippet is like:
----------------------Code
begin-------------------------------------------------------------
Xapian::QueryParser qp;
qp.add_prefix("Singer", "S");
Xapian::Query query = qp.parse_query("Singer:s.h.e",
Xapian::QueryParser::FLAG_PARTIAL|Xapian::QueryParser::FLAG_AUTO_MULTIWORD_SYNONYMS
|Xapian::QueryParser::FLAG_PHRASE );
cout << "Performing query `" << query.get_description()
<< "'" << endl;
----------------------Code
end---------------------------------------------------------------
 
See the output from the stdio,
----------------------Output
begin---------------------------------------------------------
Performing query `Xapian::Query((Ss:(pos=1) PHRASE 3 Sh:(pos=2) PHRASE 3
Se:(pos=3)))'
----------------------Output
end-----------------------------------------------------------
 
See the problem? Actually "s.h.e" is a music band from Taiwan, and I
want to use this as an entire query word to search in the singer field.
So any one who know how to let the parser get "Ss.h.e" rather than
splitted query ?
 
 
 
Thanks :)

On Tue, Nov 02, 2010 at 06:41:24PM +0800, David wrote:
> I'm using xapian to build my search engine, but met with a problem.
> The code snippet is like:
> ----------------------Code
begin-------------------------------------------------------------
> Xapian::QueryParser qp;
> qp.add_prefix("Singer", "S");
> Xapian::Query query = qp.parse_query("Singer:s.h.e",
Xapian::QueryParser::FLAG_PARTIAL|Xapian::QueryParser::FLAG_AUTO_MULTIWORD_SYNONYMS
|Xapian::QueryParser::FLAG_PHRASE );
> cout << "Performing query `" <<
query.get_description() << "'" << endl;
> ----------------------Code
end---------------------------------------------------------------
>  
> See the output from the stdio,
> ----------------------Output
begin---------------------------------------------------------
> Performing query `Xapian::Query((Ss:(pos=1) PHRASE 3 Sh:(pos=2) PHRASE 3
Se:(pos=3)))'
> ----------------------Output
end-----------------------------------------------------------
>  
> See the problem? Actually "s.h.e" is a music band from Taiwan,
and I want to
> use this as an entire query word to search in the singer field.
> So any one who know how to let the parser get "Ss.h.e" rather
than splitted query ?
QueryParser doesn't allow you to customise how it interprets word
boundaries currently - this is ticket #113:

http://trac.xapian.org/ticket/113

There's currently some special handling for acronyms punctuated with
".", but only if capitalised, so this would work as you want:

    Singer:S.H.E

Perhaps this handling should also work for lower case acronyms.  I can't
think of a good reason for it not to, except that we'd need to fix
TermGenerator to match (or else "s.h.e" in the query wouldn't
match
"s.h.e" in a document), and that is an incompatible change, so would
really need to wait for 1.3.0.

Cheers,
    Olly