About retrieve

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2

javax.persistence.PersistenceException

for later retrieval by the getCause() method). (A null value is permitted, and indicates that the cause
JPA Doc
2

javax.persistence.PessimisticLockException

), this method cannot be called even once. Parameters: cause - the cause (which is saved for later retrieval by
JPA Doc
2

javax.persistence.QueryTimeoutException

even once. Parameters: cause - the cause (which is saved for later retrieval by the getCause() method). (A null
JPA Doc
2

javax.persistence.RollbackException

for later retrieval by the getCause() method). (A null value is permitted, and indicates
JPA Doc
2

javax.persistence.TransactionRequiredException

- the cause (which is saved for later retrieval by the getCause() method). (A null value is permitted
JPA Doc
2

setFirstResult(startPosition)

Method javax.persistence.Query Query setFirstResult(   int startPosition ) Set the position of the first result to retrieve. Parameters: startPosition - position of the first result, numbered from 0 Returns: the same query instance Throws: IllegalArgumentException - if the argument is negative Since: JPA 1.0
JPA Doc
2

setFirstResult(startPosition)

Method javax.persistence.TypedQuery TypedQuery setFirstResult(   int startPosition ) Set the position of the first result to retrieve. Parameters: startPosition - position of the first result, numbered from 0 Returns: the same query instance Throws: IllegalArgumentException - if the argument is negative Since: JPA 2.0
Result
2

Throwable(cause)

throwable. Parameters: cause - the cause (which is saved for later retrieval by the getCause() method
Result
2

Throwable(message)

for later retrieval by the getMessage() method. Since: Java JDK1.0
Forum
2

Mapped By Fetch is very Slow

attribute) 2- Retrieve only 10 000 for testing 3- Wait ... On my AMD FX 8350, it took 60s Now ... MyEntity m", MyEntity.class);     // Retrieve only 10 000   List entities = query ... ();   emf.close();     // Be sure we retrieve child   if (entities.get(0).getEntityChild() == null