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I am writing a batch and using JPA for persistence. I have a table with a lot of records and I need to read all the records by groups of 100 or 500. I don’t want to load all the records into memory at once, because there won’t be enough memory.
For example:
Is there a better way to do it?
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JPA: what is the proper pattern for iterating over large result sets?
You should set the first result and the number of results in your javax.persistence.Query with methods setFirstResult() and setMaxResults().