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a/src/rcldb/rclquery_p.h |
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b/src/rcldb/rclquery_p.h |
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class Query::Native {
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class Query::Native {
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public:
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public:
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/** The query I belong to */
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/** The query I belong to */
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Query *m_q;
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Query *m_q;
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/** query descriptor: terms and subqueries joined by operators
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/** query descriptor: terms and subqueries joined by operators
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* (or/and etc...)
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* (or/and etc...)
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*/
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*/
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Xapian::Query xquery;
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Xapian::Query xquery;
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/** In case there is a postq filter: sequence of db indices that match */
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vector<int> m_dbindices;
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// Filtering results on location. There are 2 possible approaches
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// for this:
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// - Set a "MatchDecider" to be used by Xapian during the query
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// - Filter the results out of Xapian (this also uses a
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// Xapian::MatchDecider object, but applied to the results by Recoll.
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//
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// The result filtering approach was the first implemented.
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//
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// The efficiency of both methods depend on the searches, so the code
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// for both has been kept. A nice point for the Xapian approach is that
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// the result count estimate are correct (they are wrong with
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// the postfilter approach). It is also faster in some worst case scenarios
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// so this now the default (but the post-filtering is faster in many common
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// cases).
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//
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// Which is used is decided in SetQuery(), by setting either of
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// the two following members. This in turn is controlled by a
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// preprocessor directive.
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#define XAPIAN_FILTERING 1
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Xapian::MatchDecider *decider; // Xapian does the filtering
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Xapian::MatchDecider *postfilter; // Result filtering done by Recoll
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Xapian::Enquire *xenquire; // Open query descriptor.
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Xapian::Enquire *xenquire; // Open query descriptor.
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Xapian::MSet xmset; // Partial result set
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Xapian::MSet xmset; // Partial result set
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// Term frequencies for current query. See makeAbstract, setQuery
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// Term frequencies for current query. See makeAbstract, setQuery
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map<string, double> termfreqs;
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map<string, double> termfreqs;
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Native(Query *q)
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Native(Query *q)
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: m_q(q), decider(0), postfilter(0), xenquire(0)
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: m_q(q), xenquire(0)
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{ }
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{ }
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~Native() {
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~Native() {
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clear();
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clear();
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}
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}
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void clear() {
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void clear() {
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m_dbindices.clear();
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delete decider; decider = 0;
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delete postfilter; postfilter = 0;
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delete xenquire; xenquire = 0;
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delete xenquire; xenquire = 0;
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termfreqs.clear();
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termfreqs.clear();
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}
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}
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};
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};
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