search for: matchnothing

...:op op_); + /** Get the length of the query, used by some ranking formulae. * This value is calculated automatically - if you want to override * it you can pass a different value to Enquire::set_query(). @@ -285,6 +296,12 @@ */ void validate_query() const; + /** Simplify any matchnothing subqueries, either eliminating them, + * or setting this query to matchnothing, depending on the query + * operator. + */ + void simplify_matchnothing(); + /** Get a string describing the given query type. */ static std::string get_op_name(Xapian::Query::Inte...

I've just had a quick look at the XS, but I can't see quite how to make these (or just MatchAll, really) available through the Perl binding ... where should I start please?

Hi, I have read the concurrency webpage from the Xapian documentation: http://getting-started-with-xapian.readthedocs.io/en/latest/concepts/concurrency.html But it is still not clear to me how to ensure thread-safety when using libxapian (C++ API). Usually when doing multi-threading many threads can read the same variable concurrently without locking provided none of the threads modifies the