MySQL InnoDB Locking Behavior with FOR UPDATE and Indexes
PrerequisitesThe FOR UPDATE clause operates exclusively within the InnoDB storage engine and requires an active transaction block (initiated with BEGIN or START TRANSACTION). By default, MySQL runs in autocommit mode. To simulate concurrent locking scenarios, autocommit must be disabled in the test sessions:mysql> SET autocommit = 0;
Query O ...
Posted on Fri, 11 Sep 2026 16:55:48 +0000 by dandelo