About ORDER BY

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JPA Doc
7

javax.persistence.OrderColumn

for ordering that is visible as persistent state and maintained by the application. The OrderBy ... a column that is used to maintain the persistent order of a list. The persistence provider is responsible for maintaining the order upon retrieval and in the database. The persistence provider
Forum
7

Mapped By Fetch is very Slow

Well ! I think i pointed out a HUGE performance issue with mapped-by attribute (yeah ... , go the MyEntity class and remove "mapped-by". You obtain 1 second max of query fetch. So my performance issue ... .ALL,mappedBy = "myEntity") // Test by adding / remove "mappedBy" public MyEntityChild getEntityChild
Issue
7

Blocked by find

, Object obj)" method which is synchronized and attempts to load an object by id using the EntityManager ... .ObjectDbInstanceContainer@9c71a4 owned by: DEV1-WSAgent-1-Existing/3 Total blocked: 190 Total waited: 69 ... : BLOCKED on com.objectdb.o.LKM@254e85f4 owned by: ODB-FileWriter Total blocked: 789 Total waited: 616
Forum
7

Suspected memleak caused by bad state of EntityManager

and using. We find a slow memleak in our application recently, and by trace of Entity construct and finalize, we found the problem is caused by bad state of EntityManager. After first throwing ... and retrieved by EntityManagerFactory, and the instances of Entity constructed by ObjectDB
Forum
6

Merge of entity classes with "mapped by" very slow

Hi, I have found a strange behavior when merging entities with "mapped by" set on @OneToMany ... - one with mapped by, second with adding entities list without "mapped by". The difference is huge event for such small objects - 2ms (without mapped by) vs ~50ms (with mapped by) Is there any chance
Issue
6

Bulk load of eager mapped by (inverse) relationships

When a collection of objects is retrieved by ObjectDB (e.g. by a query) ordinary referenced objects ... . However, inverse (mapped by) references that have to be loaded eagerly currently do not participate ... a separate client-server round trip. Future versions of ObjectDB should load eager mapped by (inverse
Forum
6

find repeated records by JPQL

.getResultList(JpaQuery.java:636) at image.cleanDB.main(cleanDB.java:19) Caused by: com.objectdb.o ... (QRR.java:197) at com.objectdb.jpa.JpaQuery.getResultList(JpaQuery.java:627) ... 1 more Caused by ... MySQL? TIA Subqueries are not support by ObjectDB yet - see this feature request. Getting
Forum
6

persistence.xml classes not respected by ObjectDB

have the old DB on my development machine. By adding class by class into ... DB, the DB that got added class by class, as development went by. Providing an example is a little ... unspecified classes. If there is a bug and it could be demonstrated by a sample application, we will look
Forum
6

Connection is closed Caused by: java.io.EOFException

. Caused by: com.objectdb.o.UserException: Connection is closed at com.objectdb.o.MSG.d(MSG.java ... :160) ... 39 more Caused by: java.io.EOFException at com.objectdb.o.NTS.z(NTS.java ... if your application might create EntityManager instances without closing them. By the way, following your report
Forum
6

How to disable use of graphic windows by objectDB

.objectdb.Server.run(Server.java:107) at com.objectdb.Server.main(Server.java:66) Caused by: java.net ... .main(Server.java:66) Caused by: java.net.UnknownHostException: GhostRider: Name or service not known ... .run(Server.java:107) at com.objectdb.Server.main(Server.java:66) Caused by: java.net