Sql_cmd_truncate_table Class Reference

#include <sql_truncate.h>

Inheritance diagram for Sql_cmd_truncate_table:

List of all members.

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 Types
enum	truncate_result { TRUNCATE_OK = 0, TRUNCATE_FAILED_BUT_BINLOG, TRUNCATE_FAILED_SKIP_BINLOG }
Protected Member Functions
bool	lock_table (THD *, TABLE_LIST *, bool *)
enum truncate_result	handler_truncate (THD *, TABLE_LIST *, bool)
bool	truncate_table (THD *, TABLE_LIST *)

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Detailed Description

Sql_cmd_truncate_table represents the TRUNCATE statement.

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Constructor & Destructor Documentation

Sql_cmd_truncate_table::Sql_cmd_truncate_table

(

)

[inline]

Constructor, used to represent a TRUNCATE statement.

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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.

enum Sql_cmd_truncate_table::truncate_result Sql_cmd_truncate_table::handler_truncate	(	THD *	thd,
		TABLE_LIST *	table_ref,
		bool	is_tmp_table
	)		[protected]

Truncate table via the handler method.

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.

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.

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

• sql_truncate.h
• sql_truncate.cc