Xapian discuss - Dec 2008 - Obtaining actual match count if using set_collapse_key()

Greets,

Is it possible to obtain the actual match count if you're using  
set_collapse_key()?  ie, the total count *before* the collapsing  
occurs (without using get_mset()).

Alternatively, will MSet::get_matches_estimated() return the true -  
pre-collapse - count, or will it also be affected by collapsing?

Thanks
Henry

On Sat, Dec 06, 2008 at 06:56:16PM +0200, Henry wrote:
> Is it possible to obtain the actual match count if you're using  
> set_collapse_key()?  ie, the total count *before* the collapsing  
> occurs (without using get_mset()).
http://trac.xapian.org/wiki/FAQ/MoreAccurateEstimates
> Alternatively, will MSet::get_matches_estimated() return the true -  
> pre-collapse - count, or will it also be affected by collapsing?
Hmm, the API documentation is rather vague isn't it?

It's affected by collapsing - it's an estimate of the size of the MSet
if you asked for infinity documents.

Cheers,
    Olly