This internal handler is used to trap ER_NO_SUCH_TABLE and ER_BAD_DB_ERROR. More...

#include <error_handler.h>

Inheritance diagram for No_such_table_error_handler:

Public Member Functions
	No_such_table_error_handler ()

bool	handle_condition (THD , uint sql_errno, const char , Sql_condition::enum_severity_level , const char ) override
	Handle a sql condition. More...

bool	safely_trapped_errors () const
	Returns true if one or more ER_NO_SUCH_TABLE and ER_BAD_DB_ERROR errors have been trapped and no other errors have been seen. More...

Private Attributes
int	m_handled_errors

int	m_unhandled_errors

Additional Inherited Members
Protected Member Functions inherited from Internal_error_handler
	Internal_error_handler ()

Internal_error_handler *	prev_internal_handler () const

virtual	~Internal_error_handler ()=default

Detailed Description

This internal handler is used to trap ER_NO_SUCH_TABLE and ER_BAD_DB_ERROR.

Constructor & Destructor Documentation

◆ No_such_table_error_handler()

No_such_table_error_handler::No_such_table_error_handler ( )

inline

Member Function Documentation

◆ handle_condition()

bool No_such_table_error_handler::handle_condition	(	THD *	thd,
		uint	sql_errno,
		const char *	sqlstate,
		Sql_condition::enum_severity_level *	level,
		const char *	msg
	)

inlineoverridevirtual

Handle a sql condition.

This method can be implemented by a subclass to achieve any of the following:

mask a warning/error internally, prevent exposing it to the user,
mask a warning/error and throw another one instead. When this method returns true, the sql condition is considered 'handled', and will not be propagated to upper layers. It is the responsibility of the code installing an internal handler to then check for trapped conditions, and implement logic to recover from the anticipated conditions trapped during runtime.

This mechanism is similar to C++ try/throw/catch:

'try' correspond to THD::push_internal_handler(),
'throw' correspond to my_error(), which invokes my_message_sql(),
'catch' correspond to checking how/if an internal handler was invoked, before removing it from the exception stack with THD::pop_internal_handler().

Parameters

thd	the calling thread
sql_errno	the error number for the condition raised.
sqlstate	the SQLSTATE for the condition raised.
level	the severity level for the condition raised.
msg	the error message for the condition raised.

Returns: true if the condition is handled

Implements Internal_error_handler.

◆ safely_trapped_errors()

bool No_such_table_error_handler::safely_trapped_errors ( ) const

inline

Returns true if one or more ER_NO_SUCH_TABLE and ER_BAD_DB_ERROR errors have been trapped and no other errors have been seen.

false otherwise.

Member Data Documentation

◆ m_handled_errors

int No_such_table_error_handler::m_handled_errors

private

◆ m_unhandled_errors

int No_such_table_error_handler::m_unhandled_errors