metadata_locks

Overview

In 10.6 ES, 10.6 CS, 10.5 ES, 10.5 CS:

A description for this Performance-schema Table has not yet been added to this Documentation.

In 10.4 ES, 10.4 CS, 10.3 ES, 10.3 CS, 10.2 ES, 10.2 CS:

Not present

See also: Performance Schema in 10.6 ES, in 10.6 CS, in 10.5 ES, in 10.5 CS, in 10.4 ES, in 10.4 CS, in 10.3 ES, in 10.3 CS, in 10.2 ES, and in 10.2 CS

DETAILS

SCHEMA

CREATE TABLE `metadata_locks` (
  `OBJECT_TYPE` varchar(64) NOT NULL COMMENT 'Object type. One of BACKUP, COMMIT, EVENT, FUNCTION, GLOBAL, LOCKING SERVICE, PROCEDURE, SCHEMA, TABLE, TABLESPACE, TRIGGER (unused) or USER LEVEL LOCK.',
  `OBJECT_SCHEMA` varchar(64) DEFAULT NULL COMMENT 'Object schema.',
  `OBJECT_NAME` varchar(64) DEFAULT NULL COMMENT 'Object name.',
  `OBJECT_INSTANCE_BEGIN` bigint(20) unsigned NOT NULL COMMENT 'Address in memory of the instrumented object.',
  `LOCK_TYPE` varchar(32) NOT NULL COMMENT 'Lock type. One of BACKUP_FTWRL1, BACKUP_START, BACKUP_TRANS_DML, EXCLUSIVE, INTENTION_EXCLUSIVE, SHARED, SHARED_HIGH_PRIO, SHARED_NO_READ_WRITE, SHARED_NO_WRITE, SHARED_READ, SHARED_UPGRADABLE or SHARED_WRITE.',
  `LOCK_DURATION` varchar(32) NOT NULL COMMENT 'Lock duration. One of EXPLICIT (locks released by explicit action, for example a global lock acquired with FLUSH TABLES WITH READ LOCK) , STATEMENT (locks implicitly released at statement end) or TRANSACTION (locks implicitly released at transaction end).',
  `LOCK_STATUS` varchar(32) NOT NULL COMMENT 'Lock status. One of GRANTED, KILLED, PENDING, POST_RELEASE_NOTIFY, PRE_ACQUIRE_NOTIFY, TIMEOUT or VICTIM.',
  `SOURCE` varchar(64) DEFAULT NULL COMMENT 'Source file containing the instrumented code that produced the event, as well as the line number where the instrumentation occurred. This allows one to examine the source code involved.',
  `OWNER_THREAD_ID` bigint(20) unsigned DEFAULT NULL COMMENT 'Thread that requested the lock.',
  `OWNER_EVENT_ID` bigint(20) unsigned DEFAULT NULL COMMENT 'Event that requested the lock.'
)

CHANGE HISTORY

Release Series

History

10.6 Enterprise

  • Present starting in MariaDB Enterprise Server 10.6.4-1.

  • Schema changed in MariaDB Enterprise Server 10.6.5-2: ...

10.6 Community

  • Present starting in MariaDB Community Server 10.6.0.

  • Schema changed in MariaDB Community Server 10.6.5: ...

10.5 Enterprise

  • Added in MariaDB Enterprise Server 10.5.3-1.

  • Schema changed in MariaDB Enterprise Server 10.5.13-9: ...

10.5 Community

  • Added in MariaDB Community Server 10.5.2.

  • Schema changed in MariaDB Community Server 10.5.13: ...

10.4 Enterprise

  • Not present.

10.4 Community

  • Not present.

10.3 Enterprise

  • Not present.

10.3 Community

  • Not present.

10.2 Enterprise

  • Not present.

10.2 Community

  • Not present.

EXTERNAL REFERENCES