[Xapian-discuss] Latest document of a database?

[Olly Betts]

On Thu, Jun 03, 2004 at 03:02:00PM +0200, Robert Pollak wrote:
> here is a patch that defines Database::get_lastdocid() for the quartz 
> backend.

Thanks.

> I also had to call Database::remove/add instead of replace_document, to 
> always get the most recently added doc. (replace reuses the docid.)

That's by design.  If you want a new docid, remove/add is the way to do
it.

> --- api/omdatabase.cc	15 Apr 2004 08:54:05 -0000	1.1.1.1
> +++ api/omdatabase.cc	3 Jun 2004 09:24:34 -0000
> @@ -226,6 +226,18 @@
>      RETURN(docs);
>  }
>  
> +Xapian::docid
> +Database::get_lastdocid() const
> +{
> +    DEBUGAPICALL(Xapian::docid, "Database::get_lastdocid", "");
> +    Xapian::docid did = 0;
> +    vector<Xapian::Internal::RefCntPtr<Database::Internal> >::const_iterator i;
> +    for (i = internal.begin(); i != internal.end(); ++i) {
> +	did = std::max(did, (*i)->get_lastdocid());
> +    }
> +    RETURN(did);
> +}
> +
>  Xapian::doclength
>  Database::get_avlength() const
>  {

This part isn't correct - the document ids are interleaved, so you need
to convert (*i)->get_lastdocid() to give the docid in the combined
database.

It'd be nice to have this for inmemory too - it's just termlists.size()
there.

I can fix those up (but don't let me stop you if you want to...)

Cheers,
  Olly