Innodb_data_lock_iterator Class Reference

Inspect data locks for the innodb storage engine. More...

Inheritance diagram for Innodb_data_lock_iterator:

Public Member Functions
bool	scan (PSI_server_data_lock_container *container, bool with_lock_data) override
	Scan for more data locks. More...
void	fetch (PSI_server_data_lock_container *container, const char *engine_lock_id, size_t engine_lock_id_length, bool with_lock_data) override
	Fetch a given data lock. More...
Public Member Functions inherited from PSI_engine_data_lock_iterator
	PSI_engine_data_lock_iterator ()=default
virtual	~PSI_engine_data_lock_iterator ()=default

Static Private Member Functions
static size_t	report (std::unordered_map< const char *, parsed_table_path > &parsed_paths, PSI_server_data_lock_container &container, const lock_t &lock, bool with_lock_data, bool with_filter, ulint filter_heap_no=ULINT_UNDEFINED)
	For a given lock it will inform container about each lock request it represents (which can be more than one in case of LOCK_RECORD as there can be multiple lock requests differing only by heap_no compressed into single lock object), subject to filtering defined for the container, and optionally by filter_heap_no if with_filter is true. More...

Private Attributes
All_locks_iterator	m_all_locks_iterator

Detailed Description

Inspect data locks for the innodb storage engine.

Member Function Documentation

fetch()

void Innodb_data_lock_iterator::fetch ( PSI_server_data_lock_container *  container, const char *  engine_lock_id, size_t  engine_lock_id_length, bool  with_lock_data  )

overridevirtual

Fetch a given data lock.

Parameters

container	The container to fill
engine_lock_id	The lock id to search
engine_lock_id_length	Lock id length
with_lock_data	True if column LOCK_DATA is required.

Implements PSI_engine_data_lock_iterator.

report()

size_t Innodb_data_lock_iterator::report ( std::unordered_map< const char *, parsed_table_path > &  parsed_paths, PSI_server_data_lock_container &  container, const lock_t &  lock, bool  with_lock_data, bool  with_filter, ulint  filter_heap_no = ULINT_UNDEFINED  )

staticprivate

For a given lock it will inform container about each lock request it represents (which can be more than one in case of LOCK_RECORD as there can be multiple lock requests differing only by heap_no compressed into single lock object), subject to filtering defined for the container, and optionally by filter_heap_no if with_filter is true.

The with_filter is used to fetch just a lock request, the one specified by its heap_no. Please note, that there is no guarantee that the lock with this heap no is still in the lock sys.

Parameters

[in,out]	parsed_paths	The cache of table path parsing results
[in,out]	container	The container to fill. Serves as both visitor and filter
[in]	lock	The lock to inspect and report upon
[in]	with_lock_data	True if column LOCK_DATA is required.
[in]	with_filter	If true then filter_heap_no has to be passed, and means that only the lock request for that heap number (if still present and matches the container's filters) should be reported to the container. If false then all lock requests represented for this lock are considered for reporting.
[in]	filter_heap_no	if with_filter is true it further narrows the set of reported lock requests to just the one with given immutable id.

Returns

number of locks reported to the container

scan()

bool Innodb_data_lock_iterator::scan ( PSI_server_data_lock_container *  container, bool  with_lock_data  )

overridevirtual

Scan for more data locks.

Parameters

container	The container to fill
with_lock_data	True if column LOCK_DATA is required.

Returns

true if the iterator is done

Implements PSI_engine_data_lock_iterator.

Member Data Documentation

m_all_locks_iterator

All_locks_iterator Innodb_data_lock_iterator::m_all_locks_iterator

private

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

• storage/innobase/handler/p_s.cc