Xapian devel - May 2006 - term / posting question

Hi guys

Sorry to take up your time with this, I have just been stuck on a little
problem with xapian for a few days here and I can't seem to figure it
out for myself.

I have created an xapian index (using the php bindings). I have added
documents to it, with values, terms and postings. I can successfully
search in this index on anything that is in a posting, but if I search
on a word that exists as a term only, the Enquire_get_mset() function
returns 0 results.

I know the term is for sure in the document, because if I list the terms
with termiterator_get_term(), the term that I am trying to search for
above is listed.

Have I misunderstood what the terms should be used for, or is there some
option that I should pass to the enquire function to make it look in the
term list as well?

Thanks
Alec

On Mon, May 15, 2006 at 11:55:49AM -0700, Alexander Lind
wrote:
> I know the term is for sure in the document, because if I list the terms
> with termiterator_get_term(), the term that I am trying to search for
> above is listed.
> 
> Have I misunderstood what the terms should be used for, or is there some
> option that I should pass to the enquire function to make it look in the
> term list as well?
The only difference between add_term and add_posting is that add_posting
also adds positional information.

My only thought is that it might be that you're stemming postings but
not terms, and then stemming at search time, or something like that.

A good way to look at what is really in the database is to use the
"delve" utility, which you can find in xapian-core/examples.  So
for example you can list which documents index term "TERM" like this:

delve -t TERM DATABASE

If that doesn't resolve it, try to produce a small, self-contained
example showing the problem e.g. create a database, add a document with
some terms, and then fail to find that document when searching for one
of them.

Cheers,
    Olly