[Xapian-discuss] Indexing, searching and sorting signed integers

[Oliver Flimm]

Hi,

for a project we need to index, search and sort by negative integers
(years b.c.) in Xapian. Is this possible?

I already tried to index the negative integers including a search
prefix with add_term.

I have theses terms in my index

X7-58 X7-59 X7-60 

But the query parser seems to ignores the dash when searching:

2013/07/05 15:57:53 DEBUG> Xapian.pm:812 OpenBib::Search::Backend::Xapian::parse_query - Xapian-Querystring: year:-59 - Xapian-Filterstring: 
2013/07/05 15:57:53 DEBUG> Xapian.pm:292 OpenBib::Search::Backend::Xapian::search - Internal Xapian Query: Xapian::Query(X759:(pos=1))

I got the Internal Xapian Query with $enq->get_query()->get_description();

For the actual enquiry I used

my $enq       = $dbh->enquire($self->{qp}->parse_query($fullquerystring,FLAG_WILDCARD|FLAG_BOOLEAN|FLAG_PHRASE));

with year:-59 as $fullquerystring and X7 as the search prefix for year.

I would have expected X7-59 for the internal query term... And of
course I only got results for a positive term 59 ;-)

Regards,

Oliver

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