LocalSubMatch Class Reference

#include <localsubmatch.h>

Inheritance diagram for LocalSubMatch:

Collaboration diagram for LocalSubMatch:

List of all members.

Public Member Functions

LocalSubMatch (const Xapian::Database::Internal *db_, const Xapian::Query::Internal *query_, Xapian::termcount qlen_, const Xapian::RSet &rset_, const Xapian::Weight *wt_factory_)

Constructor.

bool prepare_match (bool nowait, Xapian::Weight::Internal &total_stats)

Fetch and collate statistics.

void start_match (Xapian::doccount first, Xapian::doccount maxitems, Xapian::doccount check_at_least, const Xapian::Weight::Internal &total_stats)

Start the match.

PostList * get_postlist_and_term_info (MultiMatch *matcher, std::map< std::string, Xapian::MSet::Internal::TermFreqAndWeight > *termfreqandwts, Xapian::termcount *total_subqs_ptr)

Get PostList and term info.

PostList * make_synonym_postlist (PostList *or_pl, MultiMatch *matcher, double factor)

Convert a postlist into a synonym postlist.

PostList * postlist_from_op_leaf_query (const Xapian::Query::Internal *query, double factor)

Convert an OP_LEAF query to a PostList.

Private Member Functions

void operator= (const LocalSubMatch &)

Don't allow assignment.

LocalSubMatch (const LocalSubMatch &)

Don't allow copying.

Private Attributes

const Xapian::Weight::Internal * stats

The statistics for the collection.

const Xapian::Query::Internal * query

The original query before any rearrangement.

Xapian::termcount qlen

The query length (used by some weighting schemes).

const Xapian::Database::Internal * db

The (sub-)Database we're searching.

Xapian::RSet rset

The RSet (used to calculate R and r).

const Xapian::Weight * wt_factory

Weight object (used as a factory by calling create on it).

std::map< std::string,
Xapian::MSet::Internal::TermFreqAndWeight > * term_info

The termfreqs and weights of terms used in orig_query, or NULL.

Detailed Description

Definition at line 34 of file localsubmatch.h.

Constructor & Destructor Documentation

LocalSubMatch::LocalSubMatch ( const LocalSubMatch & ) [private]

Don't allow copying.

LocalSubMatch::LocalSubMatch	(	const Xapian::Database::Internal *	db_,
		const Xapian::Query::Internal *	query_,
		Xapian::termcount	qlen_,
		const Xapian::RSet &	rset_,
		const Xapian::Weight *	wt_factory_
	)			`[inline]`

Constructor.

Definition at line 68 of file localsubmatch.h.

References LOGCALL_CTOR.

Member Function Documentation

PostList * LocalSubMatch::get_postlist_and_term_info	(	MultiMatch *	matcher,
		std::map< std::string, Xapian::MSet::Internal::TermFreqAndWeight > *	termfreqandwts,
		Xapian::termcount *	total_subqs_ptr
	)			`[virtual]`

Get PostList and term info.

Implements SubMatch.

Definition at line 70 of file localsubmatch.cc.

References Xapian::Weight::clone(), db, QueryOptimiser::get_total_subqueries(), LOGCALL, QueryOptimiser::optimise_query(), qlen, query, RETURN, stats, term_info, and wt_factory.

PostList * LocalSubMatch::make_synonym_postlist	(	PostList *	or_pl,
		MultiMatch *	matcher,
		double	factor
	)

Convert a postlist into a synonym postlist.

Definition at line 98 of file localsubmatch.cc.

References Xapian::Weight::clone(), Xapian::Weight::Internal::collection_size, Xapian::PostingIterator::Internal::get_termfreq_est(), Xapian::PostingIterator::Internal::get_termfreq_est_using_stats(), LOGCALL, LOGVALUE, qlen, RETURN, stats, usual, and wt_factory.

Referenced by QueryOptimiser::do_synonym().

void LocalSubMatch::operator= ( const LocalSubMatch & ) [private]

Don't allow assignment.

PostList * LocalSubMatch::postlist_from_op_leaf_query	(	const Xapian::Query::Internal *	query,
		double	factor
	)

Convert an OP_LEAF query to a PostList.

This is called by QueryOptimiser when it reaches an OP_LEAF query.

Definition at line 122 of file localsubmatch.cc.

References Assert, AssertEq, Xapian::Weight::clone(), db, Xapian::Weight::Internal::get_termfreq(), Xapian::Query::Internal::get_wqf(), LOGCALL, Xapian::Query::Internal::op, Xapian::Query::Internal::OP_LEAF, Xapian::Database::Internal::open_post_list(), qlen, RETURN, LeafPostList::set_termweight(), stats, Xapian::Query::Internal::subqs, term_info, Xapian::Query::Internal::tname, and wt_factory.

Referenced by QueryOptimiser::do_subquery().

bool LocalSubMatch::prepare_match	(	bool	nowait,
		Xapian::Weight::Internal &	total_stats
	)			`[virtual]`

Fetch and collate statistics.

Implements SubMatch.

Definition at line 44 of file localsubmatch.cc.

References Xapian::Weight::Internal::accumulate_stats(), Assert, db, LOGCALL, query, RETURN, and rset.

void LocalSubMatch::start_match	(	Xapian::doccount	first,
		Xapian::doccount	maxitems,
		Xapian::doccount	check_at_least,
		const Xapian::Weight::Internal &	total_stats
	)			`[virtual]`

Start the match.

Implements SubMatch.

Definition at line 56 of file localsubmatch.cc.

References LOGCALL_VOID, and stats.

Member Data Documentation

const Xapian::Database::Internal* LocalSubMatch::db [private]

The (sub-)Database we're searching.

Definition at line 51 of file localsubmatch.h.

Referenced by get_postlist_and_term_info(), postlist_from_op_leaf_query(), and prepare_match().

Xapian::termcount LocalSubMatch::qlen [private]

The query length (used by some weighting schemes).

Definition at line 48 of file localsubmatch.h.

Referenced by get_postlist_and_term_info(), make_synonym_postlist(), and postlist_from_op_leaf_query().

const Xapian::Query::Internal* LocalSubMatch::query [private]

The original query before any rearrangement.

Definition at line 45 of file localsubmatch.h.

Referenced by get_postlist_and_term_info(), and prepare_match().

Xapian::RSet LocalSubMatch::rset [private]

The RSet (used to calculate R and r).

R and r are used in probabilistic weighting formulae.

Definition at line 57 of file localsubmatch.h.

Referenced by prepare_match().

const Xapian::Weight::Internal* LocalSubMatch::stats [private]

The statistics for the collection.

Definition at line 42 of file localsubmatch.h.

Referenced by get_postlist_and_term_info(), make_synonym_postlist(), postlist_from_op_leaf_query(), and start_match().

std::map<std::string, Xapian::MSet::Internal::TermFreqAndWeight>* LocalSubMatch::term_info [private]

The termfreqs and weights of terms used in orig_query, or NULL.

Definition at line 64 of file localsubmatch.h.

Referenced by get_postlist_and_term_info(), and postlist_from_op_leaf_query().

const Xapian::Weight* LocalSubMatch::wt_factory [private]

Weight object (used as a factory by calling create on it).

Definition at line 60 of file localsubmatch.h.

Referenced by get_postlist_and_term_info(), make_synonym_postlist(), and postlist_from_op_leaf_query().

The documentation for this class was generated from the following files:

matcher/localsubmatch.h
matcher/localsubmatch.cc


Public Member Functions
	LocalSubMatch (const Xapian::Database::Internal db_, const Xapian::Query::Internal query_, Xapian::termcount qlen_, const Xapian::RSet &rset_, const Xapian::Weight *wt_factory_)
	Constructor.
bool	prepare_match (bool nowait, Xapian::Weight::Internal &total_stats)
	Fetch and collate statistics.
void	start_match (Xapian::doccount first, Xapian::doccount maxitems, Xapian::doccount check_at_least, const Xapian::Weight::Internal &total_stats)
	Start the match.
PostList *	get_postlist_and_term_info (MultiMatch matcher, std::map< std::string, Xapian::MSet::Internal::TermFreqAndWeight > termfreqandwts, Xapian::termcount *total_subqs_ptr)
	Get PostList and term info.
PostList *	make_synonym_postlist (PostList or_pl, MultiMatch matcher, double factor)
	Convert a postlist into a synonym postlist.
PostList *	postlist_from_op_leaf_query (const Xapian::Query::Internal *query, double factor)
	Convert an OP_LEAF query to a PostList.
Private Member Functions
void	operator= (const LocalSubMatch &)
	Don't allow assignment.
	LocalSubMatch (const LocalSubMatch &)
	Don't allow copying.
Private Attributes
const Xapian::Weight::Internal *	stats
	The statistics for the collection.
const Xapian::Query::Internal *	query
	The original query before any rearrangement.
Xapian::termcount	qlen
	The query length (used by some weighting schemes).
const Xapian::Database::Internal *	db
	The (sub-)Database we're searching.
Xapian::RSet	rset
	The RSet (used to calculate R and r).
const Xapian::Weight *	wt_factory
	Weight object (used as a factory by calling create on it).
std::map< std::string, Xapian::MSet::Internal::TermFreqAndWeight > *	term_info
	The termfreqs and weights of terms used in orig_query, or NULL.