Error handling class for range optimizer. More...

#include <internal.h>

Inheritance diagram for Range_optimizer_error_handler:

Public Member Functions
	Range_optimizer_error_handler ()

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

bool	has_errors () const

Private Attributes
bool	m_has_errors

bool	m_is_mem_error

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

Error handling class for range optimizer.

We handle only out of memory error here. This is to give a hint to the user to raise range_optimizer_max_mem_size if required. Warning for the memory error is pushed only once. The consequent errors will be ignored.

Constructor & Destructor Documentation

◆ Range_optimizer_error_handler()

Range_optimizer_error_handler::Range_optimizer_error_handler ( )

inline

Member Function Documentation

◆ handle_condition()

bool Range_optimizer_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.

◆ has_errors()

bool Range_optimizer_error_handler::has_errors ( ) const

inline

Member Data Documentation

◆ m_has_errors

bool Range_optimizer_error_handler::m_has_errors

private

◆ m_is_mem_error

bool Range_optimizer_error_handler::m_is_mem_error