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Updating Entities

queries since simply constructing this top level class will take many hours/days to do given

alter table

.Doctor old.odb new.odb Besides, I've stocked more than an hour, after the above command for a 10GB

Should I use ObjectDB and JDO?

several years with Objectdb. I have also spent many, many hours over many years comparing DBMS

Speed of queries that return many objects

one is about 4GB. So in the end - loading the DBs takes hours. Thanks EKK Emmanuel Keskes Unfortunately

Wrong data stored in date only fileds

/10/2015 Madrid time (when clock goes back 1 hour at 3am), Object DB puts wrong data in the fields

100% CPU when using multiple BETWEEN

regards Emil prolancer Emil Andonov Thanks. Download is very slow and could take many hours

find repeated records by JPQL

Hi, I know a single command in MySQL can find repeated records: Select * from TTT t where id in (select id from TTT s group id having count(id)>1) I dont know how to do this using JPQL, but I use query from 430,000 records and put them into hashmap, finally it cost one hour and failed

Server out of memory exceptions

haven't been able to reproduce it consistently though as it worked ok for a hour on a subsequent rerun

Exception makes the system unusable for several minutes

, we can see that always the same objects (around 4) are in charge. A doctor we cannot do currently as it takes around 6-8 hours

Once served to JSF page via @EJB query bean, many list fields are null (but same query ok after fresh persist in @PostConstruct)

against my real-world project that works with EclipseLink, and it has once again taken many hours

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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