sql_truncate.cc File Reference

#include "sql/sql_truncate.h"
#include <stddef.h>
#include <sys/types.h>
#include "lex_string.h"
#include "my_base.h"
#include "my_dbug.h"
#include "my_inttypes.h"
#include "my_io.h"
#include "my_sys.h"
#include "mysql/service_mysql_alloc.h"
#include "mysql/strings/m_ctype.h"
#include "mysqld.h"
#include "mysqld_error.h"
#include "scope_guard.h"
#include "sql/auth/auth_acls.h"
#include "sql/auth/auth_common.h"
#include "sql/dd/cache/dictionary_client.h"
#include "sql/dd/dd_schema.h"
#include "sql/dd/dd_table.h"
#include "sql/dd/properties.h"
#include "sql/dd/types/abstract_table.h"
#include "sql/dd/types/table.h"
#include "sql/debug_sync.h"
#include "sql/handler.h"
#include "sql/lock.h"
#include "sql/mdl.h"
#include "sql/query_options.h"
#include "sql/sql_audit.h"
#include "sql/sql_backup_lock.h"
#include "sql/sql_base.h"
#include "sql/sql_class.h"
#include "sql/sql_const.h"
#include "sql/sql_lex.h"
#include "sql/sql_list.h"
#include "sql/sql_show.h"
#include "sql/sql_table.h"
#include "sql/system_variables.h"
#include "sql/table.h"
#include "sql/transaction.h"
#include "sql/transaction_info.h"
#include "sql_string.h"
#include "thr_lock.h"

Namespaces
namespace	dd
	The version of the current data dictionary table definitions.

Enumerations
enum class	Truncate_result { OK = 0 , FAILED_BUT_BINLOG , FAILED_SKIP_BINLOG , FAILED_OPEN }

Functions
static const char *	fk_info_str (const THD *thd, const dd::Foreign_key_parent *fk_p)
	Generate a foreign key description suitable for a error message. More...
static bool	fk_truncate_illegal_if_parent (THD *thd, Table_ref *table_list, dd::Table *table_def)
	Check and emit a fatal error if the table which is going to be affected by TRUNCATE TABLE is a parent table in some non-self- referencing foreign key. More...
static Truncate_result	handler_truncate_base (THD *thd, Table_ref *table_ref, dd::Table *table_def)
	Open and truncate a locked base table. More...
static Truncate_result	handler_truncate_temporary (THD *thd, Table_ref *table_ref)
	Open and truncate a locked temporary table. More...

Enumeration Type Documentation

Truncate_result

enum class Truncate_result

strong

Enumerator
OK
FAILED_BUT_BINLOG
FAILED_SKIP_BINLOG
FAILED_OPEN

Function Documentation

fk_info_str()

static const char * fk_info_str ( const THD *  thd, const dd::Foreign_key_parent *  fk_p  )

static

Generate a foreign key description suitable for a error message.

Parameters

thd	Thread context.
fk_p	Object describing foreign key in parent table.

Returns

A human-readable string describing the foreign key.

fk_truncate_illegal_if_parent()

static bool fk_truncate_illegal_if_parent ( THD *  thd, Table_ref *  table_list, dd::Table *  table_def  )

static

Check and emit a fatal error if the table which is going to be affected by TRUNCATE TABLE is a parent table in some non-self- referencing foreign key.

Remarks

The intention is to allow truncate only for tables that are not dependent on other tables.

Parameters

thd	Thread context.
table_list	Table list element for the table.
table_def	dd::Table describing the table.

Return values

false	This table is not parent in a non-self-referencing foreign key. Statement can proceed.
true	This table is parent in a non-self-referencing foreign key, error was emitted.

handler_truncate_base()

static Truncate_result handler_truncate_base ( THD *  thd, Table_ref *  table_ref, dd::Table *  table_def  )

static

Open and truncate a locked base table.

Parameters

thd	Thread context.
table_ref	Table list element for the table to be truncated.
table_def	Dictionary table object.

Return values

Truncate_result::OK	Truncate was successful and statement can be safely binlogged.
Truncate_result::FAILED_BUT_BINLOG	Truncate failed but still go ahead with binlogging as in case of non transactional tables partial truncation is possible.
Truncate_result::FAILED_SKIP_BINLOG	Truncate was not successful hence do not binlog the statement.
Truncate_result::FAILED_OPEN	Truncate failed to open table, do not binlog the statement.

handler_truncate_temporary()

static Truncate_result handler_truncate_temporary ( THD *  thd, Table_ref *  table_ref  )

static

Open and truncate a locked temporary table.

Parameters

thd	Thread context.
table_ref	Table list element for the table to be truncated.

Return values

Truncate_result::OK	Truncate was successful and statement can be safely binlogged.
Truncate_result::FAILED_BUT_BINLOG	Truncate failed but still go ahead with binlogging as in case of non transactional tables partial truncation is possible.
Truncate_result::FAILED_SKIP_BINLOG	Truncate was not successful hence do not binlog the statement.
Truncate_result::FAILED_OPEN	Truncate failed to open table, do not binlog the statement.