PSI_engine_data_lock_iterator Class Reference

Engine interface, row lock iterator. More...

#include <psi_data_lock.h>

Inheritance diagram for PSI_engine_data_lock_iterator:

Public Member Functions
	PSI_engine_data_lock_iterator ()=default
virtual	~PSI_engine_data_lock_iterator ()=default
virtual bool	scan (PSI_server_data_lock_container *container, bool with_lock_data)=0
	Scan for more data locks. More...
virtual bool	fetch (PSI_server_data_lock_container *container, const char *engine_lock_id, size_t engine_lock_id_length, bool with_lock_data)=0
	Fetch a given data lock. More...

Detailed Description

Engine interface, row lock iterator.

This is the interface exposed

• by a storage engine
• to the server used to iterate over all the row locks present within the storage engine tables. The storage engine is to implement this interface. The server is to call scan() to ask the storage engine to add more rows to the container given.

Constructor & Destructor Documentation

PSI_engine_data_lock_iterator()

PSI_engine_data_lock_iterator::PSI_engine_data_lock_iterator ( )

default

~PSI_engine_data_lock_iterator()

virtual PSI_engine_data_lock_iterator::~PSI_engine_data_lock_iterator ( )

virtualdefault

Member Function Documentation

fetch()

virtual bool PSI_engine_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  )

pure virtual

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

Implemented in Innodb_data_lock_iterator.

scan()

virtual bool PSI_engine_data_lock_iterator::scan ( PSI_server_data_lock_container *  container, bool  with_lock_data  )

pure virtual

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

Implemented in Innodb_data_lock_iterator.

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

• include/mysql/psi/psi_data_lock.h