Xapian discuss - Nov 2005 - Easy deletion of documents?

Is there an easy way to delete, or lookup a docid, then delete out of 
the database? I've been hunting around but came up empty. Basically I 
have a bunch of files, all unique filenames, and some files will become 
"out-of-date" if you will, I just need a simple way of reaching into
the
database and deleting that doc based on the filename.

Thanks!

On Wed, Nov 30, 2005 at 01:55:05PM -0600, Tony Lambiris
wrote:
> Is there an easy way to delete, or lookup a docid, then delete out of 
> the database? I've been hunting around but came up empty. Basically I 
> have a bunch of files, all unique filenames, and some files will become 
> "out-of-date" if you will, I just need a simple way of reaching
into the
> database and deleting that doc based on the filename.
Just add the filename as a term to each document (with a prefix to
distinguish it from terms from text - "Q" is the usual prefix for
such uniQue terms, but nothing in the core library relies on this.

Then you can directly call delete_document or replace_document with a
termname instead of a document id.

If you have long filenames, beware of the termname length limit.  I
don't remember off the top of my head what the precise limit is, but
240 characters is certainly safe.

Omega handles longer terms by truncating and adding a hash of the rest
of the string in this case, which is a simple and robust approach.  See
function make_url_term in omindex.cc for details.

Cheers,
    Olly