Rechercher dans le manuel MySQL

25.39.20 The INFORMATION_SCHEMA INNODB_LOCKS Table

The INNODB_LOCKS table provides information about each lock that an InnoDB transaction has requested but not yet acquired, and each lock that a transaction holds that is blocking another transaction.

Note

This table is deprecated and is removed as of MySQL 8.0.1. Use the Performance Schema data_locks table instead. See Section 26.12.12.1, “The data_locks Table”.

Differences between INNODB_LOCKS and data_locks:

  • If a transaction holds a lock, INNODB_LOCKS displays the lock only if another transaction is waiting for it. data_locks displays the lock regardless of whether any transaction is waiting for it.

  • The data_locks table has no columns corresponding to LOCK_SPACE, LOCK_PAGE, or LOCK_REC.

  • The INNODB_LOCKS table requires the global PROCESS privilege. The data_locks table requires the usual Performance Schema privilege of SELECT on the table to be selected from.

The following table shows the mapping from INNODB_LOCKS columns to data_locks columns. Use this information to migrate applications from one table to the other.

Table 25.4 Mapping from INNODB_LOCKS to data_locks Columns

INNODB_LOCKS Column data_locks Column
LOCK_ID ENGINE_LOCK_ID
LOCK_TRX_ID ENGINE_TRANSACTION_ID
LOCK_MODE LOCK_MODE
LOCK_TYPE LOCK_TYPE
LOCK_TABLE (combined schema/table names) OBJECT_SCHEMA (schema name), OBJECT_NAME (table name)
LOCK_INDEX INDEX_NAME
LOCK_SPACE None
LOCK_PAGE None
LOCK_REC None
LOCK_DATA LOCK_DATA


Find a PHP function

Document created the 26/06/2006, last modified the 26/10/2018
Source of the printed document:https://www.gaudry.be/en/mysql-rf-innodb-locks-table.html

The infobrol is a personal site whose content is my sole responsibility. The text is available under CreativeCommons license (BY-NC-SA). More info on the terms of use and the author.

References

  1. View the html document Language of the document:en Manuel MySQL : https://dev.mysql.com/

These references and links indicate documents consulted during the writing of this page, or which may provide additional information, but the authors of these sources can not be held responsible for the content of this page.
The author This site is solely responsible for the way in which the various concepts, and the freedoms that are taken with the reference works, are presented here. Remember that you must cross multiple source information to reduce the risk of errors.

Contents Haut