This class represents the XA ROLLBACK ... SQL statement which rollbacks and terminates an XA transaction with the given xid value. More...

#include <sql_xa_rollback.h>

Inheritance diagram for Sql_cmd_xa_rollback:

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Public Member Functions
	Sql_cmd_xa_rollback (xid_t *xid_arg)
	Class constructor. More...

virtual	~Sql_cmd_xa_rollback () override=default

enum_sql_command	sql_command_code () const override
	Retrieves the SQL command code for this class, `SQLCOM_XA_ROLLBACK`. More...

bool	execute (THD *thd) override
	Executes the SQL command. More...

Public Member Functions inherited from Sql_cmd_xa_second_phase
	Sql_cmd_xa_second_phase (xid_t *xid_arg)
	Class constructor. More...

virtual	~Sql_cmd_xa_second_phase () override=default

Public Member Functions inherited from Sql_cmd
bool	needs_explicit_preparation () const

bool	is_regular () const

bool	is_prepared () const

virtual bool	prepare (THD *)
	Prepare this SQL statement. More...

virtual void	cleanup (THD *)
	Command-specific reinitialization before execution of prepared statement. More...

void	set_owner (Prepared_statement *stmt)
	Set the owning prepared statement. More...

Prepared_statement *	owner () const
	Get the owning prepared statement. More...

void	set_as_part_of_sp ()
	Mark statement as part of procedure. More...

bool	is_part_of_sp () const

virtual bool	is_dml () const

virtual bool	is_single_table_plan () const

virtual bool	accept (THD , Select_lex_visitor )

virtual const MYSQL_LEX_CSTRING *	eligible_secondary_storage_engine () const
	Is this statement of a type and on a form that makes it eligible for execution in a secondary storage engine? More...

void	disable_secondary_storage_engine ()
	Disable use of secondary storage engines in this statement. More...

bool	secondary_storage_engine_disabled () const
	Has use of secondary storage engines been disabled for this statement? More...

void	use_secondary_storage_engine (const handlerton *hton)
	Mark the current statement as using a secondary storage engine. More...

bool	using_secondary_storage_engine () const
	Is this statement using a secondary storage engine? More...

const handlerton *	secondary_engine () const
	Get the handlerton of the secondary engine that is used for executing this statement, or nullptr if a secondary engine is not used. More...

void	set_optional_transform_prepared (bool value)

bool	is_optional_transform_prepared ()

Private Member Functions
bool	trans_xa_rollback (THD *thd)
	Roll back and terminate a XA transaction. More...

bool	process_attached_xa_rollback (THD *thd) const
	Handle the statement XA ROLLBACK for the case when xid corresponds to an XA transaction that is attached to the thread's THD object, that is a transaction that is part of the current thread's session context. More...

bool	process_detached_xa_rollback (THD *thd)
	Handle the statement XA ROLLBACK for the case when xid corresponds to an XA transaction that is detached from the thread's THD, that it a transaction that isn't part of the current's thread session context. More...

Additional Inherited Members
Protected Member Functions inherited from Sql_cmd_xa_second_phase
bool	find_and_initialize_xa_context (THD *thd)
	Tries to find and initialize the `Transaction_ctx` for the underlying detached XA transaction. More...

bool	acquire_locks (THD *thd)
	Tries to acquire the locks necessary to finalize the underlying detached XA transaction. More...

void	release_locks () const
	Release any locks acquires in `acquire_locks` still needing to be released. More...

void	setup_thd_context (THD *thd)
	Initializes the necessary parts of the `thd` parameter, transferring some of the detached XA transaction context to the active session. More...

bool	enter_commit_order (THD *thd)
	For replica applier threads, enters the wait on the commit order. More...

void	assign_xid_to_thd (THD *thd) const
	Sets the XID_STATE of the THD session object parameter as in detached state and copies into it the XID of the detached XA transaction. More...

void	exit_commit_order (THD *thd) const
	For replica applier threads, finishes the wait on the commit order and allows other threads to proceed. More...

void	cleanup_context (THD *thd) const
	Cleans up the THD context in order to prepare it for re-use. More...

void	dispose ()
	Disposes of member variables that need it, because destructors for `Sql_cmd` classes aren't invoked (since they are created in the internal memory pool, memory is disposed as a all block). More...

Protected Member Functions inherited from Sql_cmd
	Sql_cmd ()

virtual	~Sql_cmd ()

void	set_prepared ()
	Set this statement as prepared. More...

Protected Attributes inherited from Sql_cmd_xa_second_phase
xid_t *	m_xid {nullptr}
	The XID associated with the underlying XA transaction. More...

MDL_savepoint	m_mdl_savepoint
	The MDL savepoint used to rollback the MDL context when transient errors occur. More...

std::shared_ptr< Transaction_ctx >	m_detached_trx_context {nullptr}
	The detached transaction context, retrieved from the transaction cache. More...

bool	m_gtid_error {false}
	Whether or not the initialization of GTIDs returned an error. More...

bool	m_need_clear_owned_gtid {false}
	Whether or not the OWNED_GTID related structures need to be cleaned. More...

bool	m_result {false}
	The incremental success of the several initialization and deinitialization steps. More...

Detailed Description

This class represents the XA ROLLBACK ... SQL statement which rollbacks and terminates an XA transaction with the given xid value.

See also: Sql_cmd

Constructor & Destructor Documentation

◆ Sql_cmd_xa_rollback()

Sql_cmd_xa_rollback::Sql_cmd_xa_rollback ( xid_t * xid_arg )

explicit

Class constructor.

Parameters

xid_arg XID of the XA transacation about to be rolled back.

◆ ~Sql_cmd_xa_rollback()

virtual Sql_cmd_xa_rollback::~Sql_cmd_xa_rollback ( )

overridevirtualdefault

Member Function Documentation

◆ execute()

bool Sql_cmd_xa_rollback::execute ( THD * thd )

overridevirtual

Executes the SQL command.

See also: Sql_cmd::execute

Parameters

thd	The `THD` session object within which the command is being executed.

Returns: false if the execution is successful, true otherwise.

Implements Sql_cmd.

◆ process_attached_xa_rollback()

bool Sql_cmd_xa_rollback::process_attached_xa_rollback ( THD * thd ) const

private

Handle the statement XA ROLLBACK for the case when xid corresponds to an XA transaction that is attached to the thread's THD object, that is a transaction that is part of the current thread's session context.

Parameters

thd	The `THD` session object within which the command is being executed.

Returns: operation result

Return values

false	Success
true	Failure

◆ process_detached_xa_rollback()

bool Sql_cmd_xa_rollback::process_detached_xa_rollback ( THD * thd )

private

Handle the statement XA ROLLBACK for the case when xid corresponds to an XA transaction that is detached from the thread's THD, that it a transaction that isn't part of the current's thread session context.

Parameters

thd	The `THD` session object within which the command is being executed.

Returns: operation result

Return values

false	Success
true	Failure

◆ sql_command_code()

enum_sql_command Sql_cmd_xa_rollback::sql_command_code ( ) const

overridevirtual

Retrieves the SQL command code for this class, SQLCOM_XA_ROLLBACK.

See also: Sql_cmd::sql_command_code

Returns: The SQL command code for this class, SQLCOM_XA_ROLLBACK.

Implements Sql_cmd.

◆ trans_xa_rollback()

bool Sql_cmd_xa_rollback::trans_xa_rollback ( THD * thd )

private

Roll back and terminate a XA transaction.

Parameters

thd	The `THD` session object within which the command is being executed.

Return values

false	Success
true	Failure

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

sql/xa/sql_xa_rollback.h
sql/xa/sql_xa_rollback.cc

Public Member Functions

Private Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ Sql_cmd_xa_rollback()

◆ ~Sql_cmd_xa_rollback()

Member Function Documentation

◆ execute()

◆ process_attached_xa_rollback()

◆ process_detached_xa_rollback()

◆ sql_command_code()

◆ trans_xa_rollback()