[Xapian-discuss] Search::Xapian add_database'd search results are odd?

[Eric Parusel]

Olly Betts wrote:
> On Tue, Dec 21, 2004 at 02:46:46PM -0800, Eric Parusel wrote:
> 
>>Hmm, ok, for me it's the docid's themselves that are important.
>>If the offset value is within range, I suppose I can't easily reverse 
>>the equation to get out the original docid value, right?
> 
> 
> It's easy - just:  
> 
>     did_raw = (did_merged - 1) / number_of_databases + 1
> 
>     offset = did_merged % number_of_databases
> 
> where % is modulus (like in C).

I suppose given that the two db's don't have conflicting id's, that 
executing the query twice on the two db's separately to collect the 
docids I need might actually be simpler/quicker than combining them and 
then doing an equation to get each true docid?

Eric