View_metadata_updater_error_handler Class Reference

A error handler to convert all the errors except deadlock, lock wait timeout and stack overrun to ER_VIEW_INVALID while updating views metadata. More...

Inheritance diagram for View_metadata_updater_error_handler:

Public Member Functions
bool	handle_condition (THD *, uint sql_errno, const char *, Sql_condition::enum_severity_level *, const char *msg) override
	Handle a sql condition. More...
bool	is_view_invalid () const
bool	is_view_error_handled () const
	View_metadata_updater_error_handler ()
	~View_metadata_updater_error_handler () override

Private Attributes
ErrorHandlerFunctionPointer	m_old_error_handler_hook
uint	m_sql_errno = 0
bool	m_log_error = false

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

A error handler to convert all the errors except deadlock, lock wait timeout and stack overrun to ER_VIEW_INVALID while updating views metadata.

Even a warning ER_NO_SUCH_USER generated for non-existing user is handled with the error handler.

Constructor & Destructor Documentation

View_metadata_updater_error_handler()

View_metadata_updater_error_handler::View_metadata_updater_error_handler ( )

inline

~View_metadata_updater_error_handler()

View_metadata_updater_error_handler::~View_metadata_updater_error_handler ( )

inlineoverride

Member Function Documentation

handle_condition()

bool View_metadata_updater_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.

is_view_error_handled()

bool View_metadata_updater_error_handler::is_view_error_handled ( ) const

inline

is_view_invalid()

bool View_metadata_updater_error_handler::is_view_invalid ( ) const

inline

Member Data Documentation

m_log_error

bool View_metadata_updater_error_handler::m_log_error = false

private

m_old_error_handler_hook

ErrorHandlerFunctionPointer View_metadata_updater_error_handler::m_old_error_handler_hook

private

m_sql_errno

uint View_metadata_updater_error_handler::m_sql_errno = 0

private

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

• sql/dd_sql_view.cc