Xapian discuss - Aug 2010 - Partial search on prefixed data

Hello everyone,

I'm trying to do an "Auto-complete" widget for the search field on
a
website, which has Xapian running behind it.  (Using the PHP bindings.)

I have the name of a search result prefixed with "name", so as the
user
types, it triggers a search for "name:whatever the user put in".

This seems like an ideal use for the FLAG_PARTIAL flag; in fact the
documentation seems to mention this very scenario.

However, FLAG_PARTIAL doesn't seem to work when searching with a prefix.  It
_does_ work when I remove the prefix, but then of course I don't get the
results that I'm after.

Is this the desired behavior? If so, is there a way to do what I'm after?
Google and the docs haven't contained the answer for me thus far...

Thanks a bunch,
Sean

On Sun, Aug 29, 2010 at 01:49:33AM +0200, Sean McCleary
wrote:
> However, FLAG_PARTIAL doesn't seem to work when searching with a
prefix.  It
> _does_ work when I remove the prefix, but then of course I don't get
the
> results that I'm after.
> 
> Is this the desired behavior? If so, is there a way to do what I'm
after?
> Google and the docs haven't contained the answer for me thus far...
There's test coverage for this case in queryparsertest, testcase
qp_flag_partial1:

http://trac.xapian.org/browser/trunk/xapian-core/tests/queryparsertest.cc#L929

So it works in C++ (at least in a number of cases), and it seems unlikely this
would be broken in the PHP wrappers.

The only thing I can think of is if "name" is a boolean prefix
perhaps?
That's not supported with FLAG_PARTIAL (at least not currently).

If it isn't that, can you show an actual testcase?

Cheers,
    Olly