Xapian discuss - Aug 2014 - Global number of matches

Hi,

is there a way to get the number of all possible matches for a specific
query?

Some api call like
Xapian::doccount Xapian::Enquire::get_number_of_matches();

Best wishes

Wilm

On Thu, Aug 07, 2014 at 03:02:59PM +0200, Wilm Schumacher
wrote:
> is there a way to get the number of all possible matches for a specific
> query?
> 
> Some api call like
> Xapian::doccount Xapian::Enquire::get_number_of_matches();
Xapian::MSet::get_matches_estimated()

As the name suggests, the result is an estimate - for a discussion of
this, see this FAQ entry:

http://trac.xapian.org/wiki/FAQ/MoreAccurateEstimates

Cheers,
    Olly

Hello,

1.) okay, that's what I was looking for. As my db should gives only very
small number of results most of the time, this shouldn't be a problem
(as xapian has to iterate over everything anyway). But for "silly"
querys this is a very good plan and should be accurate enough.

2.) I'm very sorry! I cannot understand how I overread this function set
O_o. Sry for bothering you with my lack of reading skills.

Thx and sry for my silly question :(

Wilm

Am 07.08.2014 um 15:47 schrieb Olly Betts:
> On Thu, Aug 07, 2014 at 03:02:59PM +0200, Wilm Schumacher wrote:
>> is there a way to get the number of all possible matches for a specific
>> query?
>>
>> Some api call like
>> Xapian::doccount Xapian::Enquire::get_number_of_matches();
> 
> Xapian::MSet::get_matches_estimated()
> 
> As the name suggests, the result is an estimate - for a discussion of
> this, see this FAQ entry:
> 
> http://trac.xapian.org/wiki/FAQ/MoreAccurateEstimates
> 
> Cheers,
>     Olly
>