About performance

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JPA Doc
3

javax.persistence.criteria.MapJoin

: selection item Since: JPA 2.0 Expression as(Class type) Perform a typecast upon the expression, returning a new expression object. Perform a typecast upon the expression, returning a new
JPA Doc
3

javax.persistence.criteria.ParameterExpression

) Perform a typecast upon the expression, returning a new expression object. Perform a typecast
JPA Doc
3

javax.persistence.criteria.Path

> type) Perform a typecast upon the expression, returning a new expression object. Perform a typecast
JPA Doc
3

javax.persistence.criteria.PluralJoin

) Perform a typecast upon the expression, returning a new expression object. Perform a typecast
JPA Doc
3

javax.persistence.criteria.Predicate

(Class type) Perform a typecast upon the expression, returning a new expression object. Perform
JPA Doc
3

javax.persistence.criteria.Root

(Class type) Perform a typecast upon the expression, returning a new expression object. Perform
JPA Doc
3

javax.persistence.criteria.SetJoin

: selection item Since: JPA 2.0 Expression as(Class type) Perform a typecast upon the expression, returning a new expression object. Perform a typecast upon the expression, returning a new
JPA Doc
3

javax.persistence.criteria.Subquery

Returns: selection item Since: JPA 2.0 Expression as(Class type) Perform a typecast upon the expression, returning a new expression object. Perform a typecast upon the expression, returning
JPA Doc
3

javax.persistence.InheritanceType

than the fields that are common to the parent class, and a join is performed to instantiate the subclass ... that are common to the parent class, and a join is performed to instantiate the subclass. Since: JPA
JPA Doc
3

lock(entity, lockMode)

, the persistence provider must also perform optimistic version checks when obtaining the database lock ... - if the entity does not exist in the database when pessimistic locking is performed