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
	Innodb_data_lock_iterator ()
	~Innodb_data_lock_iterator () override
bool	scan (PSI_server_data_lock_container *container, bool with_lock_data) override
	Scan for more data locks. More...
bool	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

Private Member Functions
template<typename Trx_list >
size_t	scan_trx_list (PSI_server_data_lock_container *container, bool with_lock_data, Trx_list *trx_list)
	Scan a trx list. More...
size_t	scan_trx (PSI_server_data_lock_container *container, bool with_lock_data, const trx_t *trx, bool with_filter, uint64_t filter_lock_immutable_id=0, ulint filter_heap_id=0)
	Scan a given trx. More...

Private Attributes
Innodb_trx_scan_state	m_scan_state
	Current scan state. More...

Detailed Description

Inspect data locks for the innodb storage engine.

Constructor & Destructor Documentation

Innodb_data_lock_iterator()

Innodb_data_lock_iterator::Innodb_data_lock_iterator ( )

default

~Innodb_data_lock_iterator()

Innodb_data_lock_iterator::~Innodb_data_lock_iterator ( )

overridedefault

Member Function Documentation

fetch()

bool 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.

Returns

true if the iterator is done

Implements PSI_engine_data_lock_iterator.

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.

scan_trx()

size_t Innodb_data_lock_iterator::scan_trx ( PSI_server_data_lock_container *  container, bool  with_lock_data, const trx_t *  trx, bool  with_filter, uint64_t  filter_lock_immutable_id = 0, ulint  filter_heap_id = 0  )

private

Scan a given trx.

Either scan all the locks for a transaction, or scan only records matching a given lock.

Parameters

[in]	container	The container to fill
[in]	with_lock_data	True if column LOCK_DATA needs to be populated.
[in]	trx	The trx to scan
[in]	with_filter	True if looking for a specific record only.
[in]	filter_lock_immutable_id	Immutable id of lock_t we are looking for
[in]	filter_heap_id	Heap id to look for, when filtering

Returns

The number of records found

scan_trx_list()

template<typename Trx_list >

size_t Innodb_data_lock_iterator::scan_trx_list ( PSI_server_data_lock_container *  container, bool  with_lock_data, Trx_list *  trx_list  )

private

Scan a trx list.

Parameters

[in]	container	The container to fill
[in]	with_lock_data	True if column LOCK_DATA needs to be populated.
[in]	trx_list	The trx list to scan

Returns

The number of records found

Member Data Documentation

m_scan_state

Innodb_trx_scan_state Innodb_data_lock_iterator::m_scan_state

private

Current scan state.

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

• storage/innobase/handler/p_s.cc