[Xapian-discuss] Merging databases

[头太晕]

2007/1/25, 头太晕 <torrycn at gmail.com>:
>
> 2007/1/25, Olly Betts <olly at survex.com>:
> >
> > On 18/01/07, Felix Antonius Wilhelm Ostmann <ostmann at websuche.de> wrote:
> > > What must i do when i want to merge databases with xapian-compact, but
> > i
> > > have the same document in every database and i only want one (the
> > > newest) document in the merged database. the uniq-id is in one value,
> > > the date in another. What is the best way?
> >
> > You'd have to write a custom merging program.  Probably the
> > "copy-database" example is the best starting point (despite the name,
> > it can also combine several databases).
> >
> > Note that xapian-compact is fast because it doesn't have to "invert
> > the database" to create the mapping from a term to a list of
> > documents.  If you're dealing with large databases, your merge will be
> > much slower because you can't really do the same.
> >
> > The easiest solution might be to avoid getting into the situation
> > where you need to do such merging if that's possible.
> >
> > Cheers,
> >     Olly
>
>
Enquire::set_collapse_key()  maybe do that.

I am sorry...the mail send two times.