Aikesheng Open Source Community
Feb 12, 2025 · Databases
Understanding the Delete Undo Log Format in MySQL 8.0 InnoDB
This article explains how MySQL 8.0 InnoDB generates and stores Delete Undo logs, detailing the log structure, field meanings, type_flag and info_bits decoding, address composition via DB_ROLL_PTR, and provides concrete SQL examples and shell calculations to illustrate the process.
Database InternalsDelete OperationInnoDB
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