Transaction_dependency_tracker Class Reference

Dependency tracker is a container singleton that dispatches between the three methods associated with the binlog-transaction-dependency-tracking option. More...

#include <rpl_trx_tracking.h>

Public Member Functions
	Transaction_dependency_tracker ()
void	get_dependency (THD *thd, bool parallelization_barrier, int64 &sequence_number, int64 &commit_parent)
	Get the dependencies in a transaction, the main entry point for the dependency tracking work. More...
void	tracking_mode_changed ()
void	update_max_committed (THD *thd)
	The method is to be executed right before committing time. More...
int64	get_max_committed_timestamp ()
int64	step ()
void	rotate ()
Writeset_trx_dependency_tracker *	get_writeset ()

Public Attributes
long	m_opt_tracking_mode

Private Attributes
Writeset_trx_dependency_tracker	m_writeset
Commit_order_trx_dependency_tracker	m_commit_order
Writeset_session_trx_dependency_tracker	m_writeset_session

Detailed Description

Dependency tracker is a container singleton that dispatches between the three methods associated with the binlog-transaction-dependency-tracking option.

There is a singleton instance of each of these classes.

Constructor & Destructor Documentation

Transaction_dependency_tracker()

Transaction_dependency_tracker::Transaction_dependency_tracker ( )

inline

Member Function Documentation

get_dependency()

void Transaction_dependency_tracker::get_dependency	(	THD *	thd,
		bool	parallelization_barrier,
		int64 &	sequence_number,
		int64 &	commit_parent
	)

Get the dependencies in a transaction, the main entry point for the dependency tracking work.

get_max_committed_timestamp()

int64 Transaction_dependency_tracker::get_max_committed_timestamp

(

)

get_writeset()

Writeset_trx_dependency_tracker * Transaction_dependency_tracker::get_writeset ( )

inline

rotate()

void Transaction_dependency_tracker::rotate

(

)

step()

int64 Transaction_dependency_tracker::step

(

)

tracking_mode_changed()

void Transaction_dependency_tracker::tracking_mode_changed

(

)

update_max_committed()

void Transaction_dependency_tracker::update_max_committed

(

THD *

thd

)

The method is to be executed right before committing time.

It must be invoked even if the transaction does not commit to engine being merely logged into the binary log. max_committed_transaction is updated with a greater timestamp value. As a side effect, the transaction context's sequence_number is reset.

Parameters

thd	a pointer to THD instance

Member Data Documentation

m_commit_order

Commit_order_trx_dependency_tracker Transaction_dependency_tracker::m_commit_order

private

m_opt_tracking_mode

long Transaction_dependency_tracker::m_opt_tracking_mode

m_writeset

Writeset_trx_dependency_tracker Transaction_dependency_tracker::m_writeset

private

m_writeset_session

Writeset_session_trx_dependency_tracker Transaction_dependency_tracker::m_writeset_session

private

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

• sql/rpl_trx_tracking.h
• sql/rpl_trx_tracking.cc