About GROUP BY

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JPA Doc
2

getGroupList()

Method javax.persistence.criteria.AbstractQuery List> getGroupList() Return a list of the grouping expressions. Returns empty list if no grouping expressions have been specified. Modifications to the list do not affect the query. Returns: the list of grouping expressions Since: JPA 2.0
JDO Doc
2

setGroup(fetchGroupName)

Method javax.jdo.FetchPlan FetchPlan setGroup(   String fetchGroupName ) Set the active fetch groups to the single named fetch group. Parameters: fetchGroupName - the single fetch group Returns: the FetchPlan Since: JDO 2.0
Forum
2

em.flush(); em.clear(); loosing data and not persisting managed objects

thread "main" [ObjectDB 2.2.3_06] Unexpected exception (Error 990) Generated by Java HotSpot(TM) 64 ... the length of primary keys, but large strings as demonstrated by this test should be avoided ... exception (Error 990) Generated by Java HotSpot(TM) 64-Bit Server VM 1.6.0_24 (on Linux 2.6.32-71
Forum
2

Error using query with MAX() function

exception (Error 990) Generated by Java HotSpot(TM) 64-Bit Server VM 1.6.0_24 (on Linux 2.6.32-71.24.1 ... that is supported by Java (i.e. up to 2GB). Your test case demonstrates an ObjectDB bug in ... ) Generated by Java HotSpot(TM) 64-Bit Server VM 1.6.0_24 (on Linux 2.6.32-71.24.1.el6.x86_64
Forum
2

Eclipse plugin problem (using ObjectDB as a separate bundle)

- is enabled. Hello, Make certain the Group items by category is selected at the bottom of the page ... . Uncheck the "Group items by category" - see nebula-cdtime.png attachement. >>2. http://dist.codehaus.org/groovy/distributions/greclipse/snapshot/e3.6/ Select "Group items by category", then deselect
Issue
2

cannot delete objects after crash (see issue 2283)

transactions together and reducing the number of sync operations by sync per such group of transactions ... is enabled with no sync, by performing one sync of the recovery file before writing a group of updates to the physical database. hgzwicker ... consideration (e.g. if synchronized writing by ObjectDB to the disk returns before the physical
Result
2

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
JPA Doc
2

javax.persistence.metamodel.EntityType

declared by the managed type that corresponds to the specified name. Return the attribute declared by the managed type that corresponds to the specified name. Parameters: name - the name ... ,?>> getDeclaredAttributes() Return the attributes declared by the managed type. Return the attributes declared by
JPA Doc
2

javax.persistence.metamodel.IdentifiableType

declared by the managed type that corresponds to the specified name. Return the attribute declared by ... ,?>> getDeclaredAttributes() Return the attributes declared by the managed type. Return the attributes declared by ...  name) Return the Collection-valued attribute declared by the managed type that corresponds
JPA Doc
2

javax.persistence.metamodel.MappedSuperclassType

Attribute getDeclaredAttribute(String name) Return the attribute declared by the managed type that corresponds to the specified name. Return the attribute declared by the managed type ... the attributes declared by the managed type. Return the attributes declared by the managed type. Returns empty