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

[Olly Betts]

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).

Cheers,
    Olly