About GROUP BY

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Issue
7

combined index not used

) and (a.objectsInCharge.properties.name = 'scheduledSlot') GROUP BY a.endDate, a.objectsInCharge ... '). Step 6: Group results --------------------- Group the results of step 5 by: a.endDate,v$1 ... = 'scheduledSlot') GROUP BY a.endDate, a.objectsInCharge.nodePath, a.objectsInCharge.properties
JDO Doc
7

javax.jdo.annotations.FetchPlan

[] fetchGroups The fetch groups in this fetch plan. The fetch groups in this fetch plan. Returns: the fetch groups Default value: {} Since: JDO 2.1 int fetchSize The number of instances of multi-valued fields retrieved by queries. The number of instances of multi-valued fields retrieved by queries
Manual
7

Locking in JPA

update collisions resulting from simultaneous updates to the same data by two concurrent users. Locking ... by another transaction. When using ObjectDB, optimistic locking is enabled by default and fully ... is automatically increased by one. Version numbers are managed internally but can be exposed by defining a version
JDO Doc
7

FetchGroup.DEFAULT

. This category includes members defined in the default fetch group in xml or annotations. Redefining the default fetch group via the API does not affect the members defined by this category. Using this category also sets the fetch-depth for the members in the default fetch group. Since: JDO 2.2
JDO Doc
7

javax.jdo.annotations.FetchGroup

javax.jdo.annotations Annotation FetchGroup Target: Classes Annotation for the fetch group of a class. Corresponds to the xml element "fetch-group". Since: JDO 2.1 String[] fetchGroups Fetch groups to be nested (included) in this fetch group. Fetch groups to be nested (included) in this fetch group
Forum
6

java.lang.NullPointerException when using ORDER BY

== 0)) ORDER BY r.startDateTime DESC If we remove the ORDER BY part, the query completes OK ... : Caused by: java.lang.IllegalStateException: com.objectdb.o.InternalException: Unexpected internal ... more                                                                                           Caused by: com.objectdb.o.InternalException: Unexpected
Result
6

Eclipse Public License - v 1.0

additions to the Program originate from and are distributed by that particular Contributor. A Contribution 'originates' from a Contributor if it was added to the Program by such Contributor itself or ... entity that distributes the Program. "Licensed Patents" mean patent claims licensable by
Manual
6

JPA / JDO Class Enhancer

ObjectDB Enhancer is a post compilation tool that improves performance by modifying the byte code ... (and actually required by JPA but not enforced by ObjectDB) to avoid accessing persistent fields ... . by using the get and set methods). If you follow this practice only user defined persistable
Manual
6

JPA Persistable Types

are represented in queries by entity names. By default, the entity name is the unqualified name ... explicitly by using the name attribute of the Entity annotation: @Entity(name="MyName") public ... superclasses are treated by ObjectDB as ordinary entity classes. Mapped superclasses are really
Result
6

Privacy Policy

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