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Changing Primary Key

#1
Trianglehead
Trianglehead's picture
Joined on 2020-12-29

I have a "Table" that currently has 

    @Id
    private String userId;
    @Id
    private long range;

private String someOtherField;

I need to add a @Id to someOtherField.  But when I add that, and query the table all the PK fields are null or 0.  What can I do to modify primary keys?

 

 

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#2
support
support's picture
Joined on 2010-05-03

ObjectDB doesn't support changing primary keys, as it may break references to objects, indexes, etc.

You can always migrate data to a new class.

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ObjectDB - Fast Object Database for Java (JPA/JDO)
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