jpa

Spring @Transactional: Class vs Method — A Critical Design Choice

Most developers see @Transactional as a magic spell for data integrity. But a deeper understanding reveals it’s a powerful policy enforced by a proxy. This perspective immediately leads to a critical design question that is often overlooked: where should this policy be declared? This is not a simple coding convention. This decision directly impacts your…

“Just Add an Index” Is Terrible Advice. Here’s Why.

Let’s be honest. Your query is slow. You ran EXPLAIN, you saw the execution plan, and you did the obvious thing: you added an index. But the result was disappointing. The speed didn’t improve much, and in some cases, it might have even gotten slower. Why? Wasn’t an index supposed to be the silver bullet? This…

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