About Group Id

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JDO Doc
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removeFetchGroups(groups)

Method javax.jdo.PersistenceManagerFactory void removeFetchGroups(   FetchGroup... groups ) Remove the FetchGroups from the set of active FetchGroups. Existing FetchGroups that match parameter ... . Parameters: groups - an array of FetchGroups Throws: SecurityException - if the caller is not
JPA Doc
19

javax.persistence.Id

javax.persistence Annotation Id Target: Fields (including property get methods) Specifies the primary key of an entity. The field or property to which the Id annotation is applied ... : @Id public Long getId() { return id; } Since: JPA 1.0 See Also: Column GeneratedValue Learn
JDO Doc
18

Constants.PMF_ATTRIBUTE_SERVER_TIME_ZONE_ID

Static Field javax.jdo.Constants String PMF_ATTRIBUTE_SERVER_TIME_ZONE_ID The name of the persistence manager factory element's "server-time-zone-id" attribute. Since: JDO 2.1
JDO Doc
18

Constants.PROPERTY_SERVER_TIME_ZONE_ID

Static Field javax.jdo.Constants String PROPERTY_SERVER_TIME_ZONE_ID Mapping "javax.jdo.option.ServerTimeZoneID" Since: JDO 2.1
Manual
18

Chapter 4 - JPA Queries (JPQL / Criteria)

(and a criteria query) is explained by describing the main clauses of JPQL queries (SELECT, FROM, WHERE, GROUP
Tutorial
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Getting Started with JPA and Eclipse

. For this tutorial, besides the Java JDK (5 or above) and the Eclipse IDE (either Eclipse IDE for Java EE Developers or Eclipse IDE for Java Developers), you only need to download and extract the ObjectDB
Forum
15

Group by date / time

something like this: SELECT COUNT(id) FROM stats WHERE YEAR(record_date) = 2009 GROUP BY DATE ... Hi, I'm trying to create reporting query that will return entities grouped by year / mont / day ... DAY() in ODB. So, how to build queries similar to something like this: SELECT COUNT(id) FROM
Tutorial
15

Getting Started with JPA and NetBeans

. For this tutorial, besides the Java JDK (5 or above) and the NetBeans IDE (any bundle that includes Java
Forum
14

On ensuring ID available after persist

or TABLE strategies, which support allocating a group of IDs in advance in one round trip ... , which relies on an "external" entity object having a non-null id after it has been passed ... up to another element) I am using the following for the ID: @Id //@GeneratedValue(strategy
JDO Doc
12

javax.jdo.PersistenceManagerFactory

addFetchGroups( FetchGroup... groups) Add the FetchGroups to the set of active fetch groups. Add the FetchGroups to the set of active fetch groups. FetchGroups are made unmodifiable before being added ... , removeFetchGroups, getFetchGroups, and removeAllFetchGroups are internally serialized. Parameters: groups