#include <queryoptimiser.h>

Collaboration diagram for Xapian::Internal::QueryOptimiser:

Public Member Functions
	QueryOptimiser (const Xapian::Database::Internal &db_, LocalSubMatch &localsubmatch_, PostListTree *matcher_, Xapian::doccount shard_index_)

	~QueryOptimiser ()

void	inc_total_subqs ()

Xapian::termcount	get_total_subqs () const

void	set_total_subqs (Xapian::termcount n)

bool	get_no_estimates () const

void	set_no_estimates (bool f)

PostListAndEstimate	open_post_list (const std::string &term, Xapian::termcount wqf, double factor, TermFreqs *termfreqs)
	Create a PostList object for term. More...

PostListAndEstimate	open_lazy_post_list (const std::string &term, Xapian::termcount wqf, double factor)

void	register_lazy_postlist_for_stats (LeafPostList pl, TermFreqs termfreqs)
	Register a lazily-created LeafPostList for stats. More...

PostListAndEstimate	make_synonym_postlist (PostListAndEstimate or_pl, double factor, const TermFreqs &termfreqs)
	Create a SynonymPostList object. More...

const LeafPostList *	get_hint_postlist () const

void	set_hint_postlist (LeafPostList *new_hint)

void	own_hint_postlist ()

void	destroy_postlist (PostList *pl)

bool	need_wdf_for_compound_weight () const

const Xapian::Weight::Internal *	get_stats () const

Public Attributes
bool	need_positions = false

bool	compound_weight = false

Xapian::doccount	shard_index

const Xapian::Database::Internal &	db

Xapian::doccount	db_size

PostListTree *	matcher

Private Member Functions
void	operator= (const QueryOptimiser &)
	Prevent assignment. More...

	QueryOptimiser (const QueryOptimiser &)
	Prevent copying. More...

Private Attributes
LocalSubMatch &	localsubmatch

Xapian::termcount	total_subqs = 0
	How many weighted leaf subqueries there are. More...

LeafPostList *	hint = nullptr

bool	hint_owned = false

bool	no_estimates = false

Detailed Description

Definition at line 36 of file queryoptimiser.h.

Constructor & Destructor Documentation

◆ QueryOptimiser() [1/2]

Xapian::Internal::QueryOptimiser::QueryOptimiser ( const QueryOptimiser & )

private

Prevent copying.

◆ QueryOptimiser() [2/2]

Xapian::Internal::QueryOptimiser::QueryOptimiser	(	const Xapian::Database::Internal &	db_,
		LocalSubMatch &	localsubmatch_,
		PostListTree *	matcher_,
		Xapian::doccount	shard_index_
	)

inline

Definition at line 71 of file queryoptimiser.h.

◆ ~QueryOptimiser()

Xapian::Internal::QueryOptimiser::~QueryOptimiser ( )

inline

Definition at line 80 of file queryoptimiser.h.

References hint, and hint_owned.

Member Function Documentation

◆ destroy_postlist()

void Xapian::Internal::QueryOptimiser::destroy_postlist ( PostList * pl )

inline

Definition at line 158 of file queryoptimiser.h.

References hint, and hint_owned.

Referenced by Xapian::Query::Internal::postlist_sub_or_like(), Xapian::Internal::QueryWindowed::postlist_windowed(), and Xapian::Internal::Context::shrink().

◆ get_hint_postlist()

const LeafPostList* Xapian::Internal::QueryOptimiser::get_hint_postlist ( ) const

inline

Definition at line 146 of file queryoptimiser.h.

References hint.

Referenced by LocalSubMatch::open_post_list().

◆ get_no_estimates()

bool Xapian::Internal::QueryOptimiser::get_no_estimates ( ) const

inline

Definition at line 90 of file queryoptimiser.h.

References no_estimates.

Referenced by LocalSubMatch::open_post_list(), Xapian::Internal::QueryPostingSource::postlist(), Xapian::Internal::QueryValueRange::postlist(), Xapian::Internal::QueryValueLE::postlist(), Xapian::Internal::QueryValueGE::postlist(), and Xapian::Internal::QueryAndMaybe::postlist_sub_and_like().

◆ get_stats()

const Xapian::Weight::Internal* Xapian::Internal::QueryOptimiser::get_stats ( ) const

inline

Definition at line 179 of file queryoptimiser.h.

References LocalSubMatch::get_stats(), and localsubmatch.

Referenced by Xapian::Internal::QueryPostingSource::postlist(), Xapian::Internal::QueryValueRange::postlist(), Xapian::Internal::QueryValueLE::postlist(), and Xapian::Internal::QueryValueGE::postlist().

◆ get_total_subqs()

Xapian::termcount Xapian::Internal::QueryOptimiser::get_total_subqs ( ) const

inline

Definition at line 86 of file queryoptimiser.h.

References total_subqs.

Referenced by LocalSubMatch::get_postlist(), Xapian::Internal::QuerySynonym::postlist(), Xapian::Internal::QueryMax::postlist(), Xapian::Internal::QueryWildcard::postlist(), Xapian::Internal::QueryEditDistance::postlist(), and Xapian::Query::Internal::postlist_sub_or_like().

◆ inc_total_subqs()

void Xapian::Internal::QueryOptimiser::inc_total_subqs ( )

inline

Definition at line 84 of file queryoptimiser.h.

References total_subqs.

Referenced by Xapian::Internal::QueryTerm::postlist(), Xapian::Internal::QueryPostingSource::postlist(), Xapian::Internal::QueryValueRange::postlist(), Xapian::Internal::QueryValueLE::postlist(), Xapian::Internal::QueryValueGE::postlist(), Xapian::Internal::QueryWildcard::postlist(), and Xapian::Internal::QueryEditDistance::postlist().

◆ make_synonym_postlist()

PostListAndEstimate Xapian::Internal::QueryOptimiser::make_synonym_postlist	(	PostListAndEstimate	or_pl,
		double	factor,
		const TermFreqs &	termfreqs
	)

inline

Create a SynonymPostList object.

Parameters

or_pl	An unweighted BoolOrPostList or OrPostList of the PostList objects for children of the OP_SYNONYM.
termfreqs	Estimated TermFreqs for or_pl.

Definition at line 139 of file queryoptimiser.h.

References localsubmatch, LocalSubMatch::make_synonym_postlist(), and matcher.

Referenced by Xapian::Internal::QueryBranch::do_synonym(), Xapian::Internal::QueryWildcard::postlist(), and Xapian::Internal::QueryEditDistance::postlist().

◆ need_wdf_for_compound_weight()

bool Xapian::Internal::QueryOptimiser::need_wdf_for_compound_weight ( ) const

inline

Definition at line 175 of file queryoptimiser.h.

References compound_weight, localsubmatch, and LocalSubMatch::weight_needs_wdf().

Referenced by Xapian::Internal::QueryAndMaybe::postlist_sub_and_like().

◆ open_lazy_post_list()

PostListAndEstimate Xapian::Internal::QueryOptimiser::open_lazy_post_list	(	const std::string &	term,
		Xapian::termcount	wqf,
		double	factor
	)

inline

Definition at line 112 of file queryoptimiser.h.

References compound_weight, localsubmatch, need_positions, LocalSubMatch::open_post_list(), and term.

◆ open_post_list()

PostListAndEstimate Xapian::Internal::QueryOptimiser::open_post_list	(	const std::string &	term,
		Xapian::termcount	wqf,
		double	factor,
		TermFreqs *	termfreqs
	)

inline

Create a PostList object for term.

Parameters

[out] termfreqs If not NULL, the pointed to object is set to the TermFreqs for term. If the database is sharded, these will be for the whole database not just the current shard. This is used to estimate TermFreqs for an OP_SYNONYM.

Definition at line 102 of file queryoptimiser.h.

References compound_weight, localsubmatch, need_positions, LocalSubMatch::open_post_list(), and term.

Referenced by Xapian::Internal::QueryTerm::postlist().

◆ operator=()

void Xapian::Internal::QueryOptimiser::operator= ( const QueryOptimiser & )

private

Prevent assignment.

◆ own_hint_postlist()

void Xapian::Internal::QueryOptimiser::own_hint_postlist ( )

inline

Definition at line 156 of file queryoptimiser.h.

References hint_owned.

Referenced by LocalSubMatch::open_post_list().

◆ register_lazy_postlist_for_stats()

void Xapian::Internal::QueryOptimiser::register_lazy_postlist_for_stats	(	LeafPostList *	pl,
		TermFreqs *	termfreqs
	)

inline

Register a lazily-created LeafPostList for stats.

Parameters

	pl	An object previously returned by open_lazy_post_list().
[out]	termfreqs	If not NULL, the pointed to object is set to the TermFreqs for term. If the database is sharded, these will be for the whole database not just the current shard. This is used to estimate TermFreqs for an OP_SYNONYM.

Definition at line 128 of file queryoptimiser.h.

References localsubmatch, and LocalSubMatch::register_lazy_postlist_for_stats().