Hibernate still issue an SQL Update query while setting value to the entity

Issue

• While trying to update a record by setting some values into the entity and using merge() method, update query has been executed before executing merge() method.

• The entity which is used in this code is not detachable entity.

• Even if merge() statement has been omitted, still update query has been executed.

• Following is the sample code snippet for the same.

SmSession  smSession  = _em.find(SmSession.class, smSessionId);

//use some setters to update
smSession .setAAA(...)
smSession .setBBB(...)

//execute merge method to update the record
_em.merge(smSession);