Xapian discuss - Mar 2011 - Changing order policy

Hi everybody,

Maybe I'm going to ask a bit weird question:

I have an item collection, most of them are writting with latin letters, but
some of them have chinese letters. There is a list page and numbers,
punctuation and chinese letters go first. I would like to change this order
policy in order to show first items that start with latin letters, and then
numbers, punctuation and chinese letters,

Is there a way to change the query order policy in Xapian?

Thanks in advance.

On Tue, Mar 15, 2011 at 09:27:04AM +0000, The Craic Finder
wrote:
> Maybe I'm going to ask a bit weird question:
> 
> I have an item collection, most of them are writting with latin letters,
but
> some of them have chinese letters. There is a list page and numbers,
> punctuation and chinese letters go first. I would like to change this order
> policy in order to show first items that start with latin letters, and then
> numbers, punctuation and chinese letters,
> 
> Is there a way to change the query order policy in Xapian?
Are you talking about ordering of results?  I.e. Xapian::Enquire's
set_sort_by_value() method.

If so, then you need to adjust the strings so they sort (by raw byte
comparisons) in the order you want.  You can either do this at index
time and alter the values you set, or do it at search time with a
subclass of Xapian::KeyMaker.

Cheers,
    Olly