Deprecated_trigger_syntax_handler Class Reference

An error handler that catches all non-OOM errors which can occur during parsing of trigger body. More...

Inheritance diagram for Deprecated_trigger_syntax_handler:

Public Member Functions
	Deprecated_trigger_syntax_handler ()
bool	handle_condition (THD *thd, uint sql_errno, const char *, Sql_condition::enum_severity_level *, const char *message) override
	Handle a sql condition. More...
LEX_STRING *	get_trigger_name ()
const char *	get_error_message ()

Private Attributes
char	m_message [MYSQL_ERRMSG_SIZE]
LEX_STRING *	m_trigger_name

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

An error handler that catches all non-OOM errors which can occur during parsing of trigger body.

Such errors are ignored and corresponding error message is used to construct a more verbose error message which contains name of problematic trigger. This error message is later emitted when one tries to perform DML or some of DDL on this table. Also, if possible, grabs name of the trigger being parsed so it can be used to correctly drop problematic trigger.

Constructor & Destructor Documentation

Deprecated_trigger_syntax_handler()

Deprecated_trigger_syntax_handler::Deprecated_trigger_syntax_handler ( )

inline

Member Function Documentation

get_error_message()

const char * Deprecated_trigger_syntax_handler::get_error_message ( )

inline

get_trigger_name()

LEX_STRING * Deprecated_trigger_syntax_handler::get_trigger_name ( )

inline

handle_condition()

bool Deprecated_trigger_syntax_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.

Member Data Documentation

m_message

char Deprecated_trigger_syntax_handler::m_message[MYSQL_ERRMSG_SIZE]

private

m_trigger_name

LEX_STRING* Deprecated_trigger_syntax_handler::m_trigger_name

private

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

• sql/trigger.cc