About relation

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Manual
8

FROM clause (JPQL / Criteria API)

. Its only purpose is specifying related objects that should be fetched from the database with the query results
Manual
8

JPA Persistence Unit

A JPA Persistence Unit is a logical grouping of user defined persistable classes (entity classes, embeddable classes and mapped superclasses) with related settings. Defining a persistence unit is optional when using ObjectDB, but required by JPA. persistence.xml Persistence units are defined in
FAQ
8

What is ObjectDB?

convert objects to records/records to objects using SQL or ORM, as opposed to when using relational
Manual
8

JPA Named Queries

mainly for Object Relational Mapping (ORM) JPA providers and less so when using ObjectDB
JPA Doc
8

JPA Annotations for Mapping (ORM)

The following JPA annotations and enums are designated for mapping a JPA object model to a relational database, and are not required by ObjectDB: ObjectDB silently ignores all the above annotations.
Manual
8

Entity Management Settings

specifies enhancement related settings: The agent attribute (whose value is "true" or "false
Manual
8

JPA Query Structure (JPQL / Criteria)

is that SQL works with relational database tables, records and fields, whereas JPQL works with Java
Manual
8

Auto Generated Values

strategies are almost identical. A tiny difference is related to the initial value attribute
JDO Doc
8

JDO Annotations for Mapping (ORM)

The following JDO annotations and enums are designated for mapping a JDO object model to a relational database, and are not required by ObjectDB: ObjectDB silently ignores all the above annotations.
Manual
8

General Settings and Logging

. Specifying an inactivity timeout may solve firewall related issues. In general, if the firewall enforces