Топ-100
 

IS_USED_LOCK

RDBMS Type: MySQL
Topic

Syntax:
IS_USED_LOCK(str)

Checks whether the lock named str is in use (that is, locked). If so,
it returns the connection identifier of the client session that holds
the lock. Otherwise, it returns NULL.

URL: https://dev.mysql.com/doc/refman/8.0/en/locking-functions.html

Example