About INSERT INTO

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JDO Doc
4

javax.jdo.annotations.Column

allowsNull Whether the column allows null values to be inserted. Whether the column allows null values to be inserted. Returns: whether the column allows null values to be inserted Default value ... insertValue Value to be inserted when this is an "unmapped" column Value to be inserted
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
Issue
3

Threaded Test - Failed to commit transaction: Unexpected internal exception

thread inserts object into the "queue" database Consumer thread reads and removes an object from the "queue" database Consumer thread inserts object into a "work in progress" database Consumer thread ... the runtime is longer due to the second insert/remove but it runs at a relatively consistent pace
JDO Doc
3

JDO Reference (JavaDoc) [2018-08-18]

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 Reference (JavaDoc) [2018-08-18]

into the following sections: The purpose of these documentation pages is to serve as a reference. In
Manual
3

ObjectDB Developer's Guide [2018-08-07]

Welcome to ObjectDB for Java/JPA Developer's Guide. Here you can learn how to develop database applications using ObjectDB and JPA (Java Persistence API). The main purpose of this guide is to make you productive with ObjectDB and JPA in a short time. Guide Structure This manual is divided into
JDO Doc
3

JDO Annotations

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

Step 4: Add a Servlet Class

session bean, which is instantiated and injected by the application server into the guestDao field
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