Feb
07
Understanding the Execution of an SQL UPDATE Statement in MySQL
When executing an UPDATE statement in MySQL, multiple components work together to ensure efficiency, consistency, and durability. The process begins with the connector handling authentication, followed by the parser and optimizer determining the best execution plan. The executor then interacts with the InnoDB storage engine, which utilizes buffer pools, undo logs, redo logs, and binlogs to maintain data integrity and support transaction management. This article delves into how MySQL processes an update query, from parsing and optimization to logging and checkpointing, ensuring data reliability even in the event of a crash.