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MySQL 8.0 Reference Manual  /  ...  /  The INFORMATION_SCHEMA INNODB_LOCKS Table

25.38.20 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


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