10 | Optimistic locking: prevent version increment on entity collection attribute the increment of the version of entity E when entities are added to or removed from the collection ... (i.e. the collection is defined as a mapped by) then adding and removing entities should not change ... side). Regarding performance, it may improve performance of adding / removing readers, but traversal from |
10 | Repair broken references in entitiesHello, it is possible to recover an entity that has been removed automatically by CascadeType.Remove. After cascade remove the removed entity will be persisted with the identical primary key. Are all broken references in other entities on this removed/persisted entity repaired again? best regards |
2 | groupBy(grouping) grouping expressions are simply removed. Parameters: grouping - list of zero or more grouping expressions Returns: the modified query Since: JPA 2.0 |
2 | Best practise loading big data += s.values.size(); // } // } // // Solution #1: remove (with not ... (); // } // itr.remove(); // } // // Solution #2: Use a temporary queue and free ... , heap size: 239995944 In solution 1 step blocks are removed from the parent collection |
0 | makeTransientAll(pcs, useFetchPlan)Method javax.jdo.PersistenceManager void makeTransientAll( Object[] pcs, boolean useFetchPlan ) Make instances transient, removing them from management by this PersistenceManager. If the useFetchPlan parameter is false, this method behaves exactly as makeTransientAll(Object[] pcs). The affected |
0 | makeTransientAll(pcs)Method javax.jdo.PersistenceManager void makeTransientAll( Collection pcs ) Make a Collection of instances transient, removing them from management by this PersistenceManager. The instances lose their JDO identity and they are no longer associated with any PersistenceManager. The state of fields |
0 | removeMember(memberName)Method javax.jdo.FetchGroup FetchGroup removeMember( String memberName ) Remove the member (field or property) from the set of members in this FetchGroup. Parameters: memberName - Returns: the FetchGroup Throws: JDOUserException - if the parameter is not a member of the persistent type |
0 | removeGroup(fetchGroupName)Method javax.jdo.FetchPlan FetchPlan removeGroup( String fetchGroupName ) Remove the fetch group from the set active fetch groups. Parameters: fetchGroupName - Returns: the FetchPlan Since: JDO 2.0 |
0 | clearGroups()Method javax.jdo.FetchPlan FetchPlan clearGroups() Remove all active groups leaving no active fetch group. Returns: the FetchPlan Since: JDO 2.0 |
0 | deletePersistent(pc)Method javax.jdo.PersistenceManager void deletePersistent( Object pc ) Delete the persistent instance from the data store. This method must be called in an active transaction. The data store object will be removed at commit. Unlike makePersistent, which makes the closure of the instance persistent |
