FlintPostListTable Class Reference

#include <flint_postlist.h>

Inheritance diagram for FlintPostListTable:

[legend]Collaboration diagram for FlintPostListTable:

[legend]List of all members.

Public Member Functions
	FlintPostListTable (string path_, bool readonly_)
	Create a new table object.
void	merge_changes (const map< string, map< Xapian::docid, pair< char, Xapian::termcount > > > &mod_plists, const map< Xapian::docid, Xapian::termcount > &doclens, const map< string, pair< Xapian::termcount_diff, Xapian::termcount_diff > > &freq_deltas)
	Merge added, removed, and changed entries.
Xapian::docid	get_chunk (const string &tname, Xapian::docid did, bool adding, PostlistChunkReader **from, PostlistChunkWriter **to)
bool	term_exists (const string &term) const
Xapian::doccount	get_termfreq (const std::string &term) const
	Returns number of docs indexed by term.
Xapian::termcount	get_collection_freq (const std::string &term) const
	Returns the number of occurrences of term in the database.
Static Public Member Functions
static string	make_key (const string &term, Xapian::docid did)
	Compose a key from a termname and docid.
static string	make_key (const string &term)
	Compose a key from a termname.

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Detailed Description

Definition at line 47 of file flint_postlist.h.

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Constructor & Destructor Documentation

FlintPostListTable::FlintPostListTable	(	string	path_,
		bool	readonly_
	)			[inline]

Create a new table object.

This does not create the table on disk - the create() method must be called before the table is created on disk

This also does not open the table - the open() method must be called before use is made of the table.

Parameters:

	path_	- Path at which the table is stored.
	readonly_	- whether to open the table for read only access.

Definition at line 61 of file flint_postlist.h.

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Member Function Documentation

void FlintPostListTable::merge_changes	(	const map< string, map< Xapian::docid, pair< char, Xapian::termcount > > > &	mod_plists,
		const map< Xapian::docid, Xapian::termcount > &	doclens,
		const map< string, pair< Xapian::termcount_diff, Xapian::termcount_diff > > &	freq_deltas
	)

Merge added, removed, and changed entries.

Definition at line 994 of file flint_postlist.cc.

References PostlistChunkWriter::append(), Assert, check_tname_in_key_lite(), FlintTable::cursor_get(), DEBUGCALL, DEBUGLINE, FlintTable::del(), PostlistChunkWriter::flush(), get_chunk(), PostlistChunkReader::get_docid(), PostlistChunkReader::get_doclength(), FlintTable::get_exact_entry(), PostlistChunkReader::get_wdf(), PostlistChunkReader::is_at_end(), make_key(), make_start_of_chunk(), make_start_of_first_chunk(), PostlistChunkReader::next(), read_start_of_chunk(), and read_start_of_first_chunk().

Referenced by FlintWritableDatabase::flush_postlist_changes().

Xapian::docid FlintPostListTable::get_chunk	(	const string &	tname,
		Xapian::docid	did,
		bool	adding,
		PostlistChunkReader **	from,
		PostlistChunkWriter **	to
	)

Definition at line 914 of file flint_postlist.cc.

References Assert, check_tname_in_key(), FlintTable::cursor_get(), make_key(), read_start_of_chunk(), read_start_of_first_chunk(), report_read_error(), and unpack_uint_preserving_sort().

Referenced by merge_changes().

static string FlintPostListTable::make_key	(	const string &	term,
		Xapian::docid	did
	)			[inline, static]

Compose a key from a termname and docid.

Definition at line 75 of file flint_postlist.h.

References pack_string_preserving_sort(), and pack_uint_preserving_sort().

Referenced by PostlistChunkWriter::append(), FlintPostList::FlintPostList(), PostlistChunkWriter::flush(), get_chunk(), merge_changes(), FlintPostList::move_to_chunk_containing(), and term_exists().

static string FlintPostListTable::make_key

(

const string &

term

)

[inline, static]

Compose a key from a termname.

Definition at line 82 of file flint_postlist.h.

References pack_string_preserving_sort().

bool FlintPostListTable::term_exists

(

const string &

term

)

const [inline]

Definition at line 86 of file flint_postlist.h.

References FlintTable::key_exists(), and make_key().

Referenced by FlintDatabase::term_exists().

Xapian::doccount FlintPostListTable::get_termfreq

(

const std::string &

term

)

const

Returns number of docs indexed by term.

This is the length of the postlist.

Referenced by FlintDatabase::get_termfreq().

Xapian::termcount FlintPostListTable::get_collection_freq

(

const std::string &

term

)

const

Returns the number of occurrences of term in the database.

This is the sum of the wdfs in the postlist.

Referenced by FlintDatabase::get_collection_freq().

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

• backends/flint/flint_postlist.h
• backends/flint/flint_postlist.cc

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