About query

forum_thread

Deadlock

Hi, I was playing with our application running on Java 7 and after switching ODB to Java 7 there was deadlock right after first few queries to database. Thread dump is attached to this post. #1 2012-07-31 13:22 Hi, I was playing with our application running on Java 7 and after switching ODB to Java 7 there was dead ...

 
forum_thread

Storing methods?

I don't think ObjectDB does this, but I want to ask to make sure: are methods stored in the database along with data?  Thanks. #1 2013-09-03 15:26 I don't think ObjectDB does this, but I want to ask to make sure: are methods stored in the database along wi ...

 
forum_thread

OptimisticLockException

Ran into this error for the first time (after many years of using odb): Caused by: com.objectdb.o._OptimisticLockException: Optimistic lock failed for object model.UserSession#28 (object has version 2 instead of 3) Also the first time I'm using odb in C/S mode rather than embedded. Also have the Explorer open Questions: a) what is it about? #1 2011-04-28 01:37 Ran into this error for the first time (after many years of using odb): Caused by: com.objectdb.o._Opti ...

 
issue

ObjectDB BIRT Driver Update

The ObjectDB BIRT/ODA driver is an extension of the open source Business Intelligence and Reporting Tools (BIRT) that adds support of ObjectDB as a data source and JPQL as a data set query language. ... of ObjectDB as a data source and JPQL as a data set query language. In the current implementation ObjectDB is embedded in ...

 
api-jpa

distinct(distinct)

Specify whether duplicate query results will be eliminated.(Method of javax.persistence.criteria.Subquery)

 
forum_thread

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.  =(  ) ... = "1mb" max - threads = "10" / > <query - cache results = "16kb" programs = "10" / ...

 
api-jpa

getCorrelatedJoins()

Return the correlated joins of the subquery.(Method of javax.persistence.criteria.Subquery)

 
api-jdo

Constants.JDOQUERY_DTD_RESOURCE

The name of the resource for the DTD of the standard JDO query metadata file.(Static Field of javax.jdo.Constants)

 
forum_thread

Does aggregate function "greatest" work on entity objects?

do not come to the function "compareTo" @Entity public class ChatHistoryItem extends AbstractObject implements Comparable {     private static final long serialVersionUID = 1L; #1 2013-08-01 11:39 Does aggregate function "greatest" work on entity objects? do not come to the function "compareTo" ...

 
forum_thread

Failing to read entities under load in multithreaded tests

Hi, We are experiencing an issue in our application that only occurs under load - we sometimes fail to read entities from the database. ... them from the DB with "No matching results for a unique query" error. The error occurs in 2-3% of iterations. When I run the same ...