And, ... :-) just wondering, is there a way one ca use NullTermQuery /
AnyTermQuery to return all records for an empty query string? Also, is
there a way to query multiple fields?
On 6/26/13 5:40 AM, Peter Karman wrote:
> LucyX::Search::NullTermQuery 0.003 is now on CPAN.
> This Lucy query extension supports looking for empty and not empty fields,
> similar to a NULL SQL query.
> foo!:NULL # or NOT foo:NULL
> syntax above supported by Search::Query::Dialect::Lucy 0.10, also now on CPAN.
> my $parser = Search::Query->parser(
> dialect => 'Lucy',
> null_term => 'NULL',
> my $query = $parser->parse('foo:NULL');
> my $hits = $lucy_searcher->hits( query => $query->as_lucy_query() );
Aleksandar Radovanovic wrote on 7/1/13 6:38 AM:
> Great work Peter! Thank you!
> And, ... :-) just wondering, is there a way one ca use NullTermQuery /
> AnyTermQuery to return all records for an empty query string?
The classes themselves do not require a query term. They just require a field name.
my $null_query = LucyX::Search::NullTermQuery->new( field => 'foo' );
Or are you asking if the query parser supports this syntax:
I.e., the empty string and the undef value are considered equivalent to NULL.
> Also, is there a
> way to query multiple fields?