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JPA Doc
3

javax.persistence.OrderColumn

is responsible for updating the ordering upon flushing to the database to reflect any insertion, deletion ... : "" Since: JPA 2.0 boolean insertable (Optional) Whether the column is included in SQL INSERT statements generated by the persistence provider. (Optional) Whether the column is included in SQL INSERT
Forum
3

Database size is much larger than expected (x2)

I store images into objectdb. The schema is : ::=(, , , , insertions with -Xmx1432m, ... NO = 151552 @ 8042217472 id = 0 @ 7703244276 ... so many memory that it fails with "-Xmx1432m", even if em.clear() at every 0xFFF insertions
Manual
3

DELETE Queries in JPA/JPQL

As explained in chapter 2, entity objects can be deleted from the database by: Retrieving the entity objects into an EntityManager. Removing these objects from the EntityManager within an active transaction, either explicitly by calling the remove method or implicitly by a cascading operation
Tutorial
3

Java EE 6 JPA Tutorial - Eclipse Project

only if Maven Integration for WTP is installed when the Maven project is imported into the IDE
JDO Doc
3

JDO Annotations

JDO defines dozens of annotations that can be divided into the following groups:
JDO Doc
3

JDO Reference (JavaDoc)

This reference contains the API documentation (similar to JavaDoc) of JDO 2.2. The content is derived from the original JDO documentation with some additions and notes. The most basic JDO types are: All the other JDO types are organized into the following sections:
JPA Doc
3

JPA 2 Annotations

JPA defines dozens of annotations that can be divided into the following groups: Annotations for JPA aware classes: Annotations for fields in JPA persistable classes: Annotations for additional JPA configuration: Annotations for JPA lifecycle event callbacks: Java EE container annotations: Many
JPA Doc
3

JPA Annotations for Java EE

The following JPA annotations are in use to integrate JPA into a Java EE application and are managed by the Java EE container:
Manual
3

JPA Named Queries

dynamically into the query string and results in more efficient queries. @NamedQuery
Manual
3

JPA Primary Key

is defined the primary key value is automatically injected into that field by ObjectDB