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CerebroSQL

IS_FREE_LOCK

Database: MySQL

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Topic

Syntax:
IS_FREE_LOCK(str)

Checks whether the lock named str is free to use (that is, not locked).
Returns 1 if the lock is free (no one is using the lock), 0 if the lock
is in use, and NULL if an error occurs (such as an incorrect argument).

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

Example

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