About JOIN

forum_thread

Eclipse Browser

Request for an eclipse browser plugin. Ideally this plugin would allow read-only access to embedded databases. #1 2010-05-22 19:08 Request for an eclipse browser plugin. Ideally this plugin would allow read-only access to embedded databases. ...

 
issue

[Explorer] Running Tools

The new Explorer of ObjectDB 2 does not support running tools from within the Explorer. The Explorer should support running ObjectDB tools, such as ObjectDB Server, ObjectDB Doctor, etc. from within the Explorer, visually. This is one of the features that have been supported by the old Explorer of ObjectDB 1.It has been temporarily removed due to incompatibility with the new ObjectDB 2 code base. Feature Request Version: Priority: Low Status: Active Replies: 0 Type:  Feature Request ...

 
issue

JPQL Subqueries (JPA 1.0)

The JPQL (Java Persistence Query Language) supports defining subqueries, which are nested queries that are embedded in other queries. Subqueries are currently not supported by ObjectDB, and as a workaround, you can use a sequence of two or more queries, where the results of one query serves as a parameter in the next queries. JPA Feature Version: Priority: Low Status: Active Replies: 0 Type:  JPA Feature ...

 
api-jdo

Join.deleteAction

Delete action to be applied to any ForeignKey on this join.(Annotation Element of javax.jdo.annotations.Join)

 
api-jpa

javax.persistence.OneToMany

Defines a many-valued association with one-to-many multiplicity.(Annotation of JPA)

 
forum_thread

How to avoid NULL values on Embedded entities

Hi there. I'm new on this. trying to learn. I'm trying to make a value non nulleable. So, when I try to upload to the DB this field as null, it give me an error. I tried this, but it didn't work: #1 2017-02-24 02:24 Hi there. I'm new on this. trying to learn. I'm trying to make a value non nulleable. So, when I ...

 
api-jdo

Element.generateForeignKey

Generate or assume a foreign key constraint exists on the column or columns associated with this join.(Annotation Element of javax.jdo.annotations.Element)

 
api-jpa

JoinTable.inverseJoinColumns

(Optional) The foreign key columns of the join table which reference the primary table of the entity that does not own the association.(Annotation Element of javax.persistence.JoinTable)

 
api-jpa

javax.persistence.DiscriminatorColumn

Specifies the discriminator column for the SINGLE_TABLE and JOINED Inheritance mapping strategies.(Annotation of JPA)

 
issue

When using inheritance, you can specify, which ID to use

When storing objects with inheritance, it should be possible to choose, which ID (parent or child class) should be used for new object. For example: public EntityA() {     @Id     long id;     String field1; }   Feature Request Version: 2.0.5 Priority: Normal Status: Active Replies: 0 Type:  Feature Request ...