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Surprise Me!

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By Jamesssss
via java-persistence-performance.blogspot.com
Submitted: Mar 07 2013 / 14:25

But what if I'm not querying by id? (database and cache indexes)
In JPA the primary key is defined as the JPA Id, and since JPA's object cache is indexed by Id, any queries by this Id obtain cache hits, and avoid database access. This is great when querying by id, and for traversing relationships across foreign keys based on the id, but what about queries not using the id?
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