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Manual
11

WHERE clause (JPQL / Criteria API)

The WHERE clause adds filtering capabilities to the FROM-SELECT structure. It is essential in any ... of this query defines an iteration over all the Country objects in the database using the c range ... , the WHERE clause gets an opportunity to function as a filter. The boolean expression in
Manual
11

SELECT clause (JPQL / Criteria API)

objects. JPA 2 adds the ability to use almost any valid JPQL expression in SELECT clauses. Specifying the required query results more precisely can improve performance and in some cases ... - JPQL does not support the "SELECT *" expression (which is commonly used in SQL). Projection of Path
Forum
11

Error in reading Enum in JPA - Failed to read using reflection

Error in reading Enum in JPA - Failed to read using reflection
Manual
10

Database Connection using JPA

during their lifetime. For instance, in a web application it is common to establish a separate ... embedded directly in your application (embedded mode), an absolute path or a relative path ... and required for other file name extensions (e.g. "objectdb:my-db.tmp"). To use client server mode, a url in
Manual
10

Database Server

ObjectDB Server is a tool that manages ObjectDB databases in a separate dedicated process, making these databases accessible to client applications in other processes including ones on other remote machines. The main benefits in running an ObjectDB server and using the client-server mode
Manual
10

JPA Persistence Unit

is optional when using ObjectDB, but required by JPA. persistence.xml Persistence units are defined in a persistence.xml file, which has to be located in the META-INF directory in the classpath ... to instantiate an EntityManagerFactory in JPA (as explained in the JPA Overview section) requires
Manual
10

Database Replication and Clustering

, the same database is managed on multiple machines (nodes), possibly in different geographic locations. This could help in achieving high availability, fault tolerance and prompt disaster recovery. In ... / Write operations. The other (slave) nodes in the cluster manage identical copies of the same database
Issue
10

Explorer bug ? Objects seem to be missing from database in Class view, but are present as references

.Source [null](TEST: a 2nd source in (1st project)) INFO: RequestBean []: Persisted: com.greensoft.entity.Source [4](TEST: a 2nd source in (1st project)) INFO: RequestBean []: Created: com.greensoft.entity.Source [null](TEST: a 3rd source (in 2nd project)) INFO: RequestBean []: Persisted: com.greensoft
Manual
10

Auto Generated Values

for entity objects with no primary key fields defined (as explained in the previous section). The same ... and are never recycled, as explained in the previous section. The Identity Strategy The IDENTITY strategy ... and using the named sequence in one or more fields in one or more classes. The @SequenceGenerator
Result
10

ObjectDB Object Database Features

/IP). Secure Client-Server mode (SSL over TCP/IP). In process embedded database mode. Capabilities ... ). Standard Persistence APIs ObjectDB is the only Object-Oriented Database with built in support ... features is in progress - see issue tracking (requires login). Java Data Objects (JDO) Complete JDO 2