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locks on pure query activities

that are just doing simple queries (just selects, no update or delete ...) show locks like these (question ... ="/" permissions="access,modify,create,delete" /> </user> <user username="$default" password="$$$###"> <dir path="/$user/" permissions="access,modify,create,delete"> <quota directories

Maintaining referential integrity

to remove an instance of Company, it is deleted from the database, no matter if it's referenced by ... such deletion. The ObjectDB Doctor can help in identifying conditions that require a fix during development

Problem with distinct select, order by and equivalent alias/attribute path

);         em.getMetamodel().entity(Location.class);         //clean up...         em.createQuery("delete from Street s").executeUpdate();         em.createQuery("delete from Location l").executeUpdate

odb file size doesn't shrink

Hello, why delete from ... doesnt modify size of odb? Even in in embedded mode, and in server mode i use recovery, not recording mode. mastervoland Vladimir Sadovnikov When objects are deleted from the database their space is marked as unused and becomes available for future objects. The size

Dirty checking

to generate a Json object with a list of the Users which were Added, Deleted, and Changed. That is a simple ... classes. Next a request comes in which deletes a company. So we need to send a message to the relevant

Schema-Update: Rename superclass and remove one subclass

to RenamedSuperClass and Remove the ChildClassB. <schema> <package name="schemaupdate.delete ... ) at schemaupdate.delete.UpdateDB.main(UpdateDB.java:32) Exception in thread "main" [ObjectDB 2.6.9 ... ) at schemaupdate.delete.UpdateDB.main(UpdateDB.java:32) btc_es BTC EmbeddedSystems Thank you for your report

database corrupt

="/" permissions="access,modify,create,delete" /> </user> <user username="$default" password="$$$###"> <dir path="/$user/" permissions="access,modify,create,delete"> <quota directories="5" files="20" disk-space

Monitoring and Performance counters

informations about how DB is doing. It would be nice to monitor: - inserts/s, updates/s, deletes/s, reads/s - total inserts, update, deletes, reads - I/O operations/s - caches current usage - uptime from

File lock exception on odb$

and the os allowed us to delete the files in question without any problem. In this case we weren't ... at the time but we ended up deleting the odb$ to get the app started. I'll try to recreate the problem

NullPointer when accessing entity field

way: for single read/write/update/delete: - we create new EntityManager, do the operation in ... ,delete from ThreadLocal and close EM So I think there is now concurrent access on one EntityManager. In

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

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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