The Ultimate Guide to High Availability with MariaDB

RELEASE_ALL_LOCKS

MariaDB until 10.5.2

RELEASE_ALL_LOCKS was added in MariaDB 10.5.2.

Syntax

RELEASE_ALL_LOCKS()

Contents

  1. Syntax
  2. Description
  3. Examples
  4. See Also

Description

Releases all named locks held by the current session. Returns the number of locks released, or 0 if none were held.

Statements using the RELEASE_ALL_LOCKS function are not safe for statement-based replication.

Examples

SELECT RELEASE_ALL_LOCKS();
+---------------------+
| RELEASE_ALL_LOCKS() | 
+---------------------+
|                   0 |
+---------------------+

SELECT GET_LOCK('lock1',10);
+----------------------+
| GET_LOCK('lock1',10) |
+----------------------+
|                    1 |
+----------------------+

SELECT RELEASE_ALL_LOCKS();
+---------------------+
| RELEASE_ALL_LOCKS() | 
+---------------------+
|                   1 |
+---------------------+

See Also

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