Xapian devel - Dec 2011 - How to enable stemming with default_op set to OP_NEAR

Hi All,

I know that from version 1.2.6, if default_op is OP_NEAR or OP_PHRASE then
stemming of the terms is disabled, since positional information isn't
indexed for stemmed terms by default. However, I would like to try using OP_NEAR
as default_op with stemming because I think the near operator is somehow
different from exact phrase. Then I wanna see how the search results looks with
this setting compared to those with OP_AND as default_op. However, even I
managed to index stemmed terms with position information I couldn't find
where to make changes to enable stemming in queryparser. I checked with
queryparser.cc and queryparser_internal.cc, but haven't find the exact piece
of codes which disabled stemming when default_op is OP_NEAR. So I guess maybe
someone here could offer some help, and I really appreciate your time!

Thanks,
Shen
 		 	   		  
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On Thu, Dec 15, 2011 at 07:16:14AM +0800, Shen Li wrote:
> I couldn't find where to make changes to enable stemming in
> queryparser. I checked with queryparser.cc and
> queryparser_internal.cc, but haven't find the exact piece of codes
> which disabled stemming when default_op is OP_NEAR. So I guess maybe
> someone here could offer some help, and I really appreciate your time!
Look for add_positional_term() in queryparser/queryparser.lemony.

You'll need to configure with --enable-maintainer-mode so that lemon
gets run to regenerate the parser code.

Cheers,
    Olly