Sql_cmd_alter_table Class Reference

Represents the generic ALTER TABLE statement. More...

#include <sql_alter.h>

Inheritance diagram for Sql_cmd_alter_table:

Public Member Functions
bool	execute (THD *thd) override
	Execute this SQL statement. More...
bool	reprepare_on_execute_required () const override
	Some SQL commands currently require re-preparation on re-execution of a prepared statement or stored procedure. 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 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 ()

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

Represents the generic ALTER TABLE statement.

Member Function Documentation

execute()

bool Sql_cmd_alter_table::execute ( THD *  thd )

overridevirtual

Execute this SQL statement.

Parameters

thd	the current thread.

Returns

false if success, true if error

Implements Sql_cmd.

reprepare_on_execute_required()

bool Sql_cmd_alter_table::reprepare_on_execute_required ( ) const

overridevirtual

Some SQL commands currently require re-preparation on re-execution of a prepared statement or stored procedure.

For example, a CREATE TABLE command containing an index expression.

Returns

true if re-preparation is required, false otherwise.

Reimplemented from Sql_cmd.

---

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

• sql/sql_alter.h
• sql/sql_alter.cc