Innodb_data_lock_wait_iterator Class Reference

Inspect data lock waits for the innodb storage engine. More...

Inheritance diagram for Innodb_data_lock_wait_iterator:

Public Member Functions
	Innodb_data_lock_wait_iterator ()=default
	~Innodb_data_lock_wait_iterator () override=default
bool	scan (PSI_server_data_lock_wait_container *container) override
	Scan for more data lock waits. More...
bool	fetch (PSI_server_data_lock_wait_container *container, const char *requesting_engine_lock_id, size_t requesting_engine_lock_id_length, const char *blocking_engine_lock_id, size_t blocking_engine_lock_id_length) override
	Fetch a given data lock wait. More...
Public Member Functions inherited from PSI_engine_data_lock_wait_iterator
	PSI_engine_data_lock_wait_iterator ()=default
virtual	~PSI_engine_data_lock_wait_iterator ()=default

Private Member Functions
template<typename Trx_list >
size_t	scan_trx_list (PSI_server_data_lock_wait_container *container, Trx_list *trx_list)
	Scan a given transaction list. More...
size_t	scan_trx (PSI_server_data_lock_wait_container *container, const trx_t *trx, bool with_filter, uint64_t filter_requesting_lock_immutable_id=0, uint64_t filter_blocking_lock_immutable_id=0)
	Scan a given transaction. More...

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

Detailed Description

Inspect data lock waits for the innodb storage engine.

Constructor & Destructor Documentation

Innodb_data_lock_wait_iterator()

Innodb_data_lock_wait_iterator::Innodb_data_lock_wait_iterator ( )

default

~Innodb_data_lock_wait_iterator()

Innodb_data_lock_wait_iterator::~Innodb_data_lock_wait_iterator ( )

overridedefault

Member Function Documentation

fetch()

bool Innodb_data_lock_wait_iterator::fetch ( PSI_server_data_lock_wait_container *  container, const char *  requesting_engine_lock_id, size_t  requesting_engine_lock_id_length, const char *  blocking_engine_lock_id, size_t  blocking_engine_lock_id_length  )

overridevirtual

Fetch a given data lock wait.

Parameters

container	The container to fill
requesting_engine_lock_id	The requesting lock id to search
requesting_engine_lock_id_length	The requesting lock id length
blocking_engine_lock_id	The blocking lock id to search
blocking_engine_lock_id_length	The blocking lock id length

Returns

true if the iterator is done

Implements PSI_engine_data_lock_wait_iterator.

scan()

bool Innodb_data_lock_wait_iterator::scan ( PSI_server_data_lock_wait_container *  container )

overridevirtual

Scan for more data lock waits.

Parameters

container

The container to fill

Returns

true if the iterator is done

Implements PSI_engine_data_lock_wait_iterator.

scan_trx()

size_t Innodb_data_lock_wait_iterator::scan_trx ( PSI_server_data_lock_wait_container *  container, const trx_t *  trx, bool  with_filter, uint64_t  filter_requesting_lock_immutable_id = 0, uint64_t  filter_blocking_lock_immutable_id = 0  )

private

Scan a given transaction.

Either scan all the waits for a transaction, or scan only records matching a given wait.

Parameters

[in]	container	The container to fill
[in]	trx	The trx to scan
[in]	with_filter	True if looking for a given wait only.
[in]	filter_requesting_lock_immutable_id	Immutable id of lock_t for the requesting lock, when filtering
[in]	filter_blocking_lock_immutable_id	Immutable idof lock_t for the blocking lock, when filtering

Returns

the number of records found.

scan_trx_list()

template<typename Trx_list >

size_t Innodb_data_lock_wait_iterator::scan_trx_list ( PSI_server_data_lock_wait_container *  container, Trx_list *  trx_list  )

private

Scan a given transaction list.

Parameters

[in]	container	The container to fill
[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_wait_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