Sql_cmd_truncate_table Class Reference

#include <sql_truncate.h>

Inheritance diagram for Sql_cmd_truncate_table:

Collaboration diagram for Sql_cmd_truncate_table:

Public Member Functions
	Sql_cmd_truncate_table ()
bool	execute (THD *thd)
virtual enum_sql_command	sql_command_code () const
	Return the command code for this statement.

Protected Member Functions
bool	lock_table (THD *, TABLE_LIST *, bool *)
int	handler_truncate (THD *, TABLE_LIST *, bool)
bool	truncate_table (THD *, TABLE_LIST *)

Additional Inherited Members
Static Public Member Functions inherited from Sql_alloc
static void *	operator new (size_t size) throw ()
static void *	operator new[] (size_t size) throw ()
static void *	operator new[] (size_t size, MEM_ROOT *mem_root) throw ()
static void *	operator new (size_t size, MEM_ROOT *mem_root) throw ()
static void	operator delete (void *ptr, size_t size)
static void	operator delete (void *ptr, MEM_ROOT *mem_root)
static void	operator delete[] (void *ptr, MEM_ROOT *mem_root)
static void	operator delete[] (void *ptr, size_t size)

Detailed Description

Sql_cmd_truncate_table represents the TRUNCATE statement.

Definition at line 24 of file sql_truncate.h.

Constructor & Destructor Documentation

Sql_cmd_truncate_table::Sql_cmd_truncate_table ( )

inline

Constructor, used to represent a TRUNCATE statement.

Definition at line 34 of file sql_truncate.h.

Member Function Documentation

bool Sql_cmd_truncate_table::execute ( THD *  thd )

virtual

Execute a TRUNCATE statement at runtime.

Parameters

thd	the current thread.

Returns

false on success.

Execute a TRUNCATE statement at runtime.

Parameters

thd	The current thread.

Returns

FALSE on success.

Implements Sql_cmd.

Definition at line 509 of file sql_truncate.cc.

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int Sql_cmd_truncate_table::handler_truncate ( THD *  thd, TABLE_LIST *  table_ref, bool  is_tmp_table  )

protected

Truncate table via the handler method.

Definition at line 187 of file sql_truncate.cc.

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bool Sql_cmd_truncate_table::lock_table ( THD *  thd, TABLE_LIST *  table_ref, bool *  hton_can_recreate  )

protected

Handle locking a base table for truncate.

Definition at line 305 of file sql_truncate.cc.

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bool Sql_cmd_truncate_table::truncate_table ( THD *  thd, TABLE_LIST *  table_ref  )

protected

Optimized delete of all rows by doing a full regenerate of the table. Depending on the storage engine, it can be accomplished through a drop and recreate or via the handler truncate method.

Definition at line 393 of file sql_truncate.cc.

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

• sql/sql_truncate.h
• sql/sql_truncate.cc