How to improve statement caching efficiency with IN clause parameter padding

Introduction Recently, I stumbled on the following Twitter thread: This jOOQ feature is indeed really useful since it reduces the number of SQL statements that have to be generated when varying the IN clause parameters dynamically. Starting with Hibernate ORM 5.2.18, it’s now possible to use IN clause parameter padding so that you can improve SQL Statement Caching efficiency. In this article, I’m going to explain how this new mechanism works and why you should definitely consider it when using a relational database system which supports Execution Plan caching.

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