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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.
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 toLOCK_SPACE
,LOCK_PAGE
, orLOCK_REC
.The
INNODB_LOCKS
table requires the globalPROCESS
privilege. Thedata_locks
table requires the usual Performance Schema privilege ofSELECT
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 |
Document created the 26/06/2006, last modified the 26/10/2018
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