About schema

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Manual
16

Chapter 6 - Configuration

The ObjectDB configuration file contains one root element with seven subelements: ... ... ... <schema> ... schema> ... ... ...
Issue
16

Feature Request: Subclassed PersistenceException for Type Not Found in DB Schema

with different schemas managed by the same ObjectDB server that are sharded based on the day.  We let ObjectdDB create the schema in each ODB file the first time objects are persisted.  The problem is that when a process runs that querys a shard before the schema is created a generic PersistenceException
Forum
16

Schema-Update: Rename superclass and remove one subclass

SuperClass to RenamedSuperClass and Remove the ChildClassB. <schema> schema ... . It demonstrates well a bug in schema evolution that includes renaming a super class and removing
Forum
15

Activation error on Schema change

to your schema may cause a similar exception. Please verify that an activation code ... where copied to new version directory. No schema change, no application modification just migration to new ODB
Issue
15

Compare two schemas or odb files

For example, if we make a backup of our database it would be helpful to have the possibility to compare the backup schema (odb file) with the current version in the database and as result we should get the difference between the two schemas. It would also be sufficient, if we can compare object
Forum
15

How does objectdb deal with conflicting schemas?

Suppose we have an objectdb network server with multiple clients connecting to it. Some clients have the latest object schema, matching that of the server. But some have an older schema, not using fields that have since been added. Will this work? This is strictly forbidden. You must have the same version of classes everywhere. FastModel
Forum
15

Indexes broken after schema update.

Anyone else noticed this? I updated an entity Object with some new fields, restarted the database to pick up the new schema and now none of the indexes work, except the @Id. I can query by any field ... the revised schema. It is a common operation to add persistent fields to existing applications
Forum
15

Is there a way to extract the schema from an existing Database?

Hi ObjectDB, Is there a way to extract the schema from an existing Database? i.e. without using my class files Thanks EKK The schema is available for viewing in the Explorer. You may use the JPA Metamodel API to extract it using your own code. EKK
Forum
15

Schema evolution & renamed/moved enum

to use the <schema> tag in the config file because my enum is not an entity. What is a the proper way of handling the migration? Thanks, Farid  It seems that in this case automatic schema evolution
Forum
15

Schema Update: class hierarchy change

Hello, we try to change the class hierarchy of an Entity. You wrote www.objectdb.com/database/forum/899 that ObjectDB support automatic schema evolution for adding and removing fields and for class ... fields up and down in the class hierarchy as part of the automatic schema evolution