top of page
![](https://static.wixstatic.com/media/11062b_fac51a38acf24ea2aa030216e01a0ea3f000.jpg/v1/fill/w_288,h_162,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/11062b_fac51a38acf24ea2aa030216e01a0ea3f000.jpg)
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
bottom of page