[KinoSearch] I'm getting fewer than expected results when supplying multiple fields

[Adam]

On (15/11/07 15:52), Marvin Humphrey wrote:
> On Nov 10, 2007, at 3:23 AM, Adam . wrote:
> 
> >I'll strip out the irrelevent code/data and send my data and test case
> >to you off-list once I've got a refined example.
> 
> I've isolated the problem and can provide a workaround.  It turns out  
> not to be ANDScorer after all.  ANDScorer has held up well under more  
> thorough testing.
> 
> Instead, the problem manifests during SegPList_Skip_To.   It either  
> occurs because of something awry in the SegPList_skip_to function  
> itself, or because either PostingsWriter or LexWriter isn't writing  
> skip information correctly.
> 
> SegPList_Skip_To is only an optimization though.  If we disable it,  
> then SegPostingList inherits the definitive method from Scorer...
> 
>     bool_t
>     Scorer_skip_to(Scorer *self, u32_t target)
>     {
>         do {
>             if ( !Scorer_Next(self) )
>                 return false;
>         } while ( target > Scorer_Doc(self) );
> 
>         return true;
>     }
> 
> ... which produces the correct results.
> 
> To implement the workaround, comment out the declaration of Skip_To  
> in SegPostingList.h...
> 
>   /*
>   chy_bool_t
>   kino_SegPList_skip_to(kino_SegPostingList *self, chy_u32_t target);
>   KINO_METHOD("Kino_SegPList_Skip_To");
>   */
> 
> ... then run this sequence:
> 
>    ./Build distclean
>    perl Build.PL
>    ./Build [test, install, code, whatever]
> 
> Note: the distclean step is *essential*.

I have commented out the above code, but got this fatal error when doing the 
./Build install step :

  In file included from c_src/KinoSearch/Index/SegPostingList.c:5:
  c_src/r/KinoSearch/Index/SegPostingList.r:200: error: 'kino_SegPList_skip_to' undeclared here (not in a function)
  error building c_src/KinoSearch/Index/SegPostingList.o from 'c_src/KinoSearch/Index/SegPostingList.c' at /usr/local/share/perl/5.8.8/ExtUtils/CBuilder/Base.pm line 108.

I commented out line 200 of SegPostingList.r :

      (kino_PList_skip_to_t)kino_SegPList_skip_to,

and ran the above 3 build steps again. This time it completed successfully.

I rebuilt my index again which went fine, but when I try my search
script, I get the following error :

  Can't locate object method "collect" via package "KinoSearch::Util::VirtualTable" at
  /usr/local/lib/perl/5.8.8/KinoSearch/Searcher.pm line 123.

Can you advise?

> The investigation of this bug has produced some happy side effects.

A beneficial bug? I must remember to use that spin at work. :-)

Thanks,

Adam

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