Class that represents the ALTER TABLE t1 EXCHANGE PARTITION p WITH TABLE t2 statement. More...

#include <sql_partition_admin.h>

Inheritance diagram for Sql_cmd_alter_table_exchange_partition:

Public Member Functions
bool	execute (THD *thd) override
	Execute this SQL statement. More...

Public Member Functions inherited from Sql_cmd_common_alter_table
	~Sql_cmd_common_alter_table () override=0

enum_sql_command	sql_command_code () const final
	Return the command code for this statement. More...

	Sql_cmd_ddl_table (Alter_info *alter_info)

Public Member Functions inherited from Sql_cmd_ddl_table
	Sql_cmd_ddl_table (Alter_info *alter_info)

	~Sql_cmd_ddl_table () override=0

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 bool	reprepare_on_execute_required () const
	Some SQL commands currently require re-preparation on re-execution of a prepared statement or stored procedure. 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	exchange_partition (THD thd, Table_ref , Alter_info *)
	Swap places between a partition and a table. More...

Additional Inherited Members
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_ddl_table
Alter_info *const	m_alter_info

Detailed Description

Class that represents the ALTER TABLE t1 EXCHANGE PARTITION p WITH TABLE t2 statement.

Member Function Documentation

◆ exchange_partition()

bool Sql_cmd_alter_table_exchange_partition::exchange_partition	(	THD *	thd,
		Table_ref *	table_list,
		Alter_info *	alter_info
	)

private

Swap places between a partition and a table.

Verify that the tables are compatible (same engine, definition etc), verify that all rows in the table will fit in the partition, if all OK, rename table to tmp name, rename partition to table and finally rename tmp name to partition.

1) Take upgradable mdl, open tables and then lock them (inited in parse) 2) Verify that metadata matches 3) verify data 4) Upgrade to exclusive mdl for both tables 5) Rename table <-> partition 6) Rely on close_thread_tables to release mdl and table locks

Parameters

thd	Thread handle
table_list	Table where the partition exists as first table, Table to swap with the partition as second table
alter_info	Contains partition name to swap

Note: This is a DDL operation so triggers will not be used.

◆ execute()

bool Sql_cmd_alter_table_exchange_partition::execute ( THD * thd )

overridevirtual

Execute this SQL statement.

Parameters

thd	the current thread.

Returns: false if success, true if error

Implements Sql_cmd.

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

sql/sql_partition_admin.h
sql/sql_partition_admin.cc

Public Member Functions

Private Member Functions

Additional Inherited Members

Detailed Description

Member Function Documentation

◆ exchange_partition()

◆ execute()