Xapian discuss - Oct 2010 - overlapping docids when searching on multiple databases?

Just a quick question - it seems to me that it's entirely possible to
get overlapping docids when searching on multiple databases?  For
instance:  

open database1
add database2 to database1

search db1+db2 

if docid 10 exists in both databases, is there any way of telling which
which database to retrieve the document from?


/Per Jessen, Z?rich

On 22 October 2010 09:32, Per Jessen <per at computer.org>
wrote:
> Just a quick question - it seems to me that it's entirely possible to
> get overlapping docids when searching on multiple databases? ?For
> instance:
This doesn't happen, because the document IDs presented by a
multi-database are formed by interleaving the document IDs from the
sub-databases.
In your example, you'll be able to access one of the documents as
docid 19, and one as docid 20.

For details of how to convert from the docid in a multi database to
the docid in the sub-database, see:
http://trac.xapian.org/wiki/FAQ/MultiDatabaseDocumentID

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