doesn't driving query pattern cause N+1 problem?

问题

In spring batch reference, there is a pattern called driving query pattern https://docs.spring.io/spring-batch/4.1.x/reference/html/common-patterns.html#drivingQueryBasedItemReaders

I don't know if I misunderstand this pattern right, doesn't driving query pattern cause N+1 problem?

It looks like a classic N+1 problem to me, especially they are bad practice in ORM world.

回答1:

Yes it does. For each item, the processor will issue another query to grab additional information about the current item.

来源：https://stackoverflow.com/questions/57156705/doesnt-driving-query-pattern-cause-n1-problem