Entitymanager merge not updating record

Posted by / 26-Feb-2020 16:30

Entitymanager merge not updating record

based upon your requirement for persisting object into Database.

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either INSERT or UPDATE based upon existence of object in database.

If persistence object already exists in database then UPDATE SQL will execute and if there is no corresponding object in database than INSERT will run.

First difference between save and persist is there return type.

Similar to save method persist also INSERT records into database but return type of persist is void while return type of save is Serializable object.

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It is often used to re-attach a detached object into Session.