undo_truncate::Undo_num2id_map Class Reference

Map from undo tablespace number to space id to allow a reserved undo space ID to be found quickly. More...

#include <trx0undo_trunc.h>

Public Member Functions
	Undo_num2id_map (const std::vector< space_id_t > &space_ids)
	Constructor which will create the mapping from UNDO space number to UNDO space id from the given space_id list. More...
space_id_t	get (space_id_t num)
	Find the UNDO space_id for a given UNDO space number from the mapping. More...
bool	contains (space_id_t num)
	check if mapping contains an entry for given UNDO space number. More...

Private Attributes
std::unordered_map< space_id_t, space_id_t >	m_num2id {}
	Map from undo space_num to undo space_id. More...

Detailed Description

Map from undo tablespace number to space id to allow a reserved undo space ID to be found quickly.

Constructor & Destructor Documentation

Undo_num2id_map()

undo_truncate::Undo_num2id_map::Undo_num2id_map ( const std::vector< space_id_t > &  space_ids )

inline

Constructor which will create the mapping from UNDO space number to UNDO space id from the given space_id list.

Parameters

[in]

space_ids

list of space ids

Member Function Documentation

contains()

bool undo_truncate::Undo_num2id_map::contains ( space_id_t  num )

inline

check if mapping contains an entry for given UNDO space number.

Parameters

[in]

num

UNDO space number

Returns

True if entry is there, false otherwise

get()

space_id_t undo_truncate::Undo_num2id_map::get ( space_id_t  num )

inline

Find the UNDO space_id for a given UNDO space number from the mapping.

Parameters

[in]

num

Undo space number

Returns

UNDO space_id

Member Data Documentation

m_num2id

std::unordered_map<space_id_t, space_id_t> undo_truncate::Undo_num2id_map::m_num2id {}

private

Map from undo space_num to undo space_id.

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

• storage/innobase/include/trx0undo_trunc.h