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Different behavior for two equal queries

3: Group results --------------------- Group the results of step 2by:   $1. [Step 4] Remove duplicates from the groups of step 3. [Step 5] Apply selection and prepare final results. Second ... .cellphone,'%Q%'),like(v$7.name,'%Q%'),like(v$3.name,'%Q%'),like(v$1.name,'%Q%')). Step 27: Group results


Method javax.persistence.criteria.AbstractQuery List<Expression<?>> 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

BIRT/ODA ObjectDB Driver

. For step by step instructions on using BIRT with ObjectDB see the Report Generation with BIRT ... extension. To install it: Open the [Install] dialog box by selecting Help > Install New Software... In ... ENTER. Select the ObjectDB Birt/ODA feature. Complete the installation by clicking Next twice, accepting

Database Server

, if an ObjectDB database is accessed directly only by a web application, it should be embedded in ... . This can be overridden by specifying a configuration path explicitly on the command line: > java com.objectdb ... connections is also specified in the Server Configuration, but can be overridden by an explicit command line

Database Transaction Replayer

. Recording is enabled by default and can be disabled in the configuration. The ObjectDB Replayer tool ... is useful for two different purposes: It enables recovery from a database failure by replaying the recorded operations. It enables reproducing problems during debugging by repeating a failure. Backup

Setting and Tuning of JPA Queries

since the setter methods in Query and TypedQuery support method chaining (by returning the query object ... order to be visible to the query. Flush policy in JPA is represented by the FlushModeType enum ... ObjectDB the default is COMMIT (which is more efficient). The default mode can be changed by

JPA Metamodel API

Metamodel API is Metamodel. It can be obtained either by the EntityManagerFactory's getMetamodel method or by the EntityManager's getMetamodel method (both methods are equivalent). For example, given an EntityManager, em, a Metamodel instance can be obtained by: Metamodel metamodel = em.getMetamodel

Step 3: Define an EJB Session Bean

Operations on the database will be performed by an instance of a session bean (EJB) class that we will define in this step: Open the [New Java Class] dialog box by right clicking the guest package ... ORDER BY g.id", Guest.class); return query.getResultList(); } } The GuestDao session

Step 1: Install BIRT and ObjectDB Driver

We start by installing the BIRT development environment and the ObjectDB data source driver ... for Java EE Developers. Update your existing Eclipse IDE for Java EE Developers environment by ... Eclipse IDE for Java EE Developers environment: Open the [Install] dialog box by selecting Help


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

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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