Xapian devel - May 2011 - FLAG_PARTIAL and subset words

I've encountered a very interesting bug/limitation of Xapian while
trying to implement an auto-complete search. For instance while
searching for "volvo v" the results were identical to just
"volvo"
digging a little bit I found out it has to do with the fact that the
second partial word is a subset of the first word so results such as
Volvo v90 are not considered to be better than Volvo s70, same thing
happens with Ford F150, basically searching for "volvo vol" (assuming
volvo volume) ignores the second partial word. It's not a huge issue,
since "volvo s" works as expected and is only a special case but I
thought it was worth mentioning.

On Fri, May 13, 2011 at 03:22:37AM +0200, Greg wrote:
> I've encountered a very interesting bug/limitation of Xapian while
> trying to implement an auto-complete search. For instance while
> searching for "volvo v" the results were identical to just
"volvo"
> digging a little bit I found out it has to do with the fact that the
> second partial word is a subset of the first word so results such as
> Volvo v90 are not considered to be better than Volvo s70, same thing
> happens with Ford F150, basically searching for "volvo vol"
(assuming
> volvo volume) ignores the second partial word. It's not a huge issue,
> since "volvo s" works as expected and is only a special case but
I
> thought it was worth mentioning.
I'm unable to reproduce this with trunk.

What version of Xapian are you using?

How have you configured the QueryParser?

What does get_description() return on the Query object you get from the
QueryParser?  (Or if you're using python, call str(query_obj) to get
this).

Cheers,
    Olly