About ORDER BY

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Forum
6

Order in WHERE Clause affects behaviour on DATE/DATETIME columns

:query"); q.setParameter("query", "%myQuery%"); I don't get any error! The order
JDO Doc
6

javax.jdo.spi.JDOImplHelper

-capable classes and to perform common operations needed by implementations, not by end users ... . There is no security restriction on this access. JDO implementations get access to the functions provided by this class only if they are authorized by the security manager. To avoid having
JDO Doc
6

javax.jdo.JDOHelper

: Constants This class can be used by a JDO-aware application to call the JDO behavior ... managed by the PersistenceManager. This method returns a copy of the ObjectId that represents ... . If the JDO identity is managed by the application, then the ObjectId may be used
Result
6

java.lang.Throwable

) are thrown by the Java Virtual Machine or can be thrown by the Java throw statement. Similarly ... , and so on, leading to a "chain" of exceptions, each caused by another. One reason that a throwable may have a cause ... thrown by the lower layer propagate outward, as it is generally unrelated to the abstraction provided
Manual
5

Retrieving JPA Entity Objects

of entity classes and to keep them simple as possible. Retrieval by Class and Primary Key Every entity object can be uniquely identified and retrieved by the combination of its class and its primary key ... except that if the entity object is not already managed by the EntityManager a hollow object
JPA Doc
5

javax.persistence.ColumnResult

result by specifying this annotation in the metadata. Example: Query q = em.createNativeQuery( "SELECT o.id AS order_id, " + "o.quantity AS order_quantity, " + "o.item AS order_item, " + "i.name AS item_name, " + "FROM Order o, Item i
Result
5

Apache License, Version 2.0, January 2004

the terms and conditions for use, reproduction, and distribution as defined by Sections 1 through 9 of this document. "Licensor" shall mean the copyright owner or entity authorized by the copyright ... and all other entities that control, are controlled by, or are under common control with that entity
Result
5

java.lang.Exception

is not initialized, and may subsequently be initialized by a call to initCause. Since: Java JDK1.0 ... be initialized by a call to initCause. Parameters: message - the detail message. The detail message is saved for later retrieval by the getMessage() method. Since: Java JDK1.0 Exception(Throwable cause
Forum
5

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
5

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