This article clarifies the distinction between the theoretical ANSI Repeatable Read isolation level and the practical Snapshot Isolation implementation found in MySQL, explaining how modern databases often deviate from strict locking-based definitions to prevent anomalies like dirty and inconsistent reads.
Background
Understanding the difference between theoretical SQL standards and actual database engine implementations is crucial for application developers managing concurrency and data consistency.
- Source
- Lobsters
- Published
- Jul 19, 2026 at 06:15 AM
- Score
- 7.0 / 10