Fast Object Database for Java - with JPA/JDO support

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Deleting archive log folder causes exception

Hello, we have observed strange behaviour when we delete odb archive log directory. We are running long term tests and during it we are deleting all logs that are not needed keeping the system running. When the "archive/" folder, where odb logs are archived, is deleted, the exceptions occur

Is there a function of "drop table" or "delete from table"?

Besides the em.remove() one by one, is there a function of "drop table" or "delete from table"? TIA gzdillon Lai Yang You can execute a DELETE query:     em.createQuery("DELETE FROM MyEntity e ... "drop table" in this site BTW. gzdillon Lai Yang The code “createQuery("DELETE FROM MyEntity e

How to delete a specific column data form a entity.

I have a entity class named Agent having fields Id,Name,Code,Skill ...etc. I wants to delete only the Skill from a row so I use Query like "Delete a.Skill from Agent a where a.Id = 112" but It gives ... You ObjDBUser3 ObjectDBUser DELETE queries are for deleting complete objects (rows). You may use an UPDATE query

OneToMany and cascade delete problem

(which is deleted together with product). You can see this in attached example. The question is - is it a bug ... I think that the Offer class and cascading delete from Product ... of Product instances in a Store when the Product is deleted. Otherwise a broken reference from Store

Cascading delete

Is there a configuration parameter to set this? dmoshal David Moshal You can set cascade delete using annotations (see also the Orphan Removal section). JDO defines similar annotations, and both JPA ... configuration. You cannot set global cascade delete since that will be too risky - you may delete the entire database. support Support

Delete class from DB - through Explorer

Hi! I was looking for ways to delete a class (entity/embedded) from a database through Explorer ... is to delete the whole db and make a new one, but that's not a good scenario ... . However, it only affects the list of classes in the Explorer, so you may just ignore the deleted class

Issue with cascade delete & add/remove

of Address which cascades deletes (orphanRemoval=true) to its children which is what we want ... it has never been deleted from the collection (at least, until the transaction is comitted ... Entities within the collection of a Contact when we delete the Contact? Is that cascaded or do we need

Cascade delete with unidirectional mapping

Suppose entity A is referenced from entity B, like (A -> * B) but not actually having that reference, instead only B has @ManyToOne relationship to A and A has none. Is there a way to cascade delete of B's when deleting A? Or this should be done programatically with separate call to database

Need disk usage and delete some old files

Hello , is it possible to get disk usage of database ? If disk usage becomes too high , delete old date files from database. And recalculate disk usage back ? kadirbasol Kadir BASOL Since an ObjectDB ... "Need disk usage and delete some old files" and should be focus only on that subject. support Support

delete of a collection in explorer changes type

accidently we used the option delete on a collection of type ArrayList. On doing so the type changed to List. we are using explorer version 2.7.1_02 How can we change that back again ? hgzwicker Hans-Georg Zwicker Is it only an issue with the type of the field as shown by

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Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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