#include <log.h>

Inheritance diagram for TC_LOG:

Public Types
enum	enum_result { RESULT_SUCCESS, RESULT_ABORTED, RESULT_INCONSISTENT }

Public Member Functions
int	using_heuristic_recover ()
virtual int	open (const char *opt_name)=0
virtual void	close ()=0
virtual enum_result	commit (THD *thd, bool all)=0
virtual int	rollback (THD *thd, bool all)=0
virtual int	prepare (THD *thd, bool all)=0

Detailed Description

Transaction Coordinator Log.

A base abstract class for three different implementations of the transaction coordinator.

The server uses the transaction coordinator to order transactions correctly and there are three different implementations: one using an in-memory structure, one dummy that does not do anything, and one using the binary log for transaction coordination.

Definition at line 48 of file log.h.

Member Function Documentation

virtual enum_result TC_LOG::commit	(	THD *	thd,
		bool	all
	)

pure virtual

Log a commit record of the transaction to the transaction coordinator log.

When the function returns, the transaction commit is properly logged to the transaction coordinator log and can be committed in the storage engines.

Parameters

thd	Session to log transaction for.
all	`True` if this is a "real" commit, `false` if it is a "statement" commit.

Returns: Error code on failure, zero on success.

Implemented in TC_LOG_DUMMY.

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virtual int TC_LOG::prepare	(	THD *	thd,
		bool	all
	)

pure virtual

Log a prepare record of the transaction to the storage engines.

Parameters

thd	Session to log transaction record for.
all	`true` if an explicit commit or an implicit commit for a statement, `false` if an internal commit of the statement.

Returns: Error code on failure, zero on success.

Implemented in TC_LOG_DUMMY.

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virtual int TC_LOG::rollback	(	THD *	thd,
		bool	all
	)

pure virtual

Log a rollback record of the transaction to the transaction coordinator log.

When the function returns, the transaction have been aborted in the transaction coordinator log.

Parameters

thd	Session to log transaction record for.
all	`true` if an explicit commit or an implicit commit for a statement, `false` if an internal commit of the statement.

Returns: Error code on failure, zero on success.

Implemented in TC_LOG_DUMMY.

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int TC_LOG::using_heuristic_recover ( )

Perform heuristic recovery, if –tc-heuristic-recover was used.

Note: no matter whether heuristic recovery was successful or not mysqld must exit. So, return value is the same in both cases.

Return values

0	no heuristic recovery was requested
1	heuristic recovery was performed

Definition at line 2914 of file log.cc.

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

sql/log.h
sql/log.cc

Public Types

Public Member Functions

Detailed Description

Member Function Documentation