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Group by date / time

(YEAR, MONTH, DAY, HOUR, MINUTE, SECOND) was just added to ObjectDB in build 2.2.8_02. For example ... ), MONTH(e.t), DAY(e.t), " +             "HOUR(e.t), MINUTE(e.t), SECOND(e.t) FROM MyEntity e

Grouping by date()

to 12. DAY({d '2011-12-31'}) is evaluated to 31. HOUR({t '23:59:00'}) is evaluated to 23. MINUTE({t ... ) - Extracts the time part (hour, minute, second, millisecond) as a Date instance. Please try the new

Slow searching with two indexes

, but when I also query using the other key, queries can take minutes. Looking at the database log ... to (say) 10 results. Is there any obvious way to speed up this querying? Taking minutes is not

Empty temporary dat files in the temp folder

was completed more than 2 minutes ago. support Support Thank you, the patch (2.6.8_08) solve the problem. And also many thanks for the description of the '2 minutes' clean up. With this information

Soft Reference Object Cache Recommendation

(Trying again. Last post, ~50 minutes to compose, failed, possibly due to an attachment upload size limit being exceeded before the post attempt. =( ) I desire to have my persistent objects be cached until the Java Virtual Machine (JVM) does a full Garbage Collection (GC) when heap RAM gets low

impossible to drop a table with 50 million objects

when trying to execute in explorer (max heap size 1GByte) delete from LogEntry l it comes up with a Java heap error after 20 minutes of executing. How to empty such a table ? hgzwicker Hans-Georg Zwicker This may be because the transaction size is limited by the heap size. You can try deleting

JRebel integration feature

for full redeployment of large web applications that take many minutes to fully redeploy. (No, this is not an ad

NullPointerException when using multithreading

:     threadPoolExecutor.shutdown();     threadPoolExecutor.awaitTermination(3, TimeUnit.MINUTES);     factory.close(); After 3 minutes the EntityManagerFactory is closed with all its EntityManager instances

Server out of memory exceptions

after a few minutes of running. I've attached the code, the multithreaded unit test library i'm using ... . > 60 threads after about 2 minutes). Each thread manages its own EntityManager, which may consume

Online Backup degrades responsiveness.

about 5 minutes. When the "DB Backup Start..." starts, 2-3 minutes after I would have lots of players

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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