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Re: [eclipselink-users] find always does db lookup?
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By default, when you do an em.find(), in the same em, you will get the same
entity without a DB lookup. This is likely the same in all persistence providers.
In other circumstances, you may or may not get the same object.
i.e. In a different em, there is a reasonable chance, a find will return the
same object without a db lookup. (dependant on cache settings and number of
reads running in app)
When running a JPA query, you will see SQL, but if the object is in the cache,
it will be returned and not changed based on the data in the DB.
JPA provides a refresh() API to allow refreshing and EclipseLink provides a
refresh query hint as well along with a number of cache settings that can be
used to alter this behavior.
-Tom
jehanzeb.qayyum@xxxxxxxxx wrote:
Hi,
If I find an entity, eclipselink gets it from db. I do some changes on the entity. Now what will happen if I again find the same entity (same PK)? Will it do another db lookup to get db copy or return the changed entity from em context.
Thanks
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