Xapian discuss - Jan 2006 - xapian_doc_id doubles if you search more than one database

I noticed that if you search two databases then

$xapian_doc_id = MSetIterator_get_docid($mseti);

returns the wrong doc_id (exactly double the real doc_id).

Example: 
I had a document in one database with doc_id = 312.  It only exists in the one 
database.  But when I do a search through two databases it finds the one and 
only document (as expected) but reports the doc_id as 624.

Regards,
-Ted.

On Wed, Jan 04, 2006 at 04:59:16AM +0000, Ted Jordan
wrote:
> I noticed that if you search two databases then
> 
> $xapian_doc_id = MSetIterator_get_docid($mseti);
> 
> returns the wrong doc_id (exactly double the real doc_id).
When searching more than one database, the document ids used by the
Xapian::Database object are mapped to avoid collisions (since both
databases might have a document with docid 1, etc).  This thread has all
the details:

http://thread.gmane.org/gmane.comp.search.xapian.general/1369

Cheers,
    Olly