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17

Delete object from collection versus delete from JPQL

Delete object from collection versus delete from JPQL
17

[ODB1] Chapter 6 - Persistent Objects

, every transient object that, at commit time, is reachable from a persistent object (using persistent ... . An embedded object cannot be shared by references from multiple objects. In addition, embedded ... or queried directly (an embedded object can only be retrieved using a reference from its containing
13

Dependency from enhanced classes to the objectDB library

Hello, we have a Question to the dependency from enhanced classes (required for license ... Example #2) I have the ObjectDB removed from the bundle "com.btc.ep.base.bl.impl". Now we get the error message from post #1. java.lang.NoClassDefFoundError: com/objectdb/spi/TrackableUserType at java
13

Failover from Master to Slave

to evaluate your tool I would like to know if your product has the ability to failover from a Master ... will still be able to read from the slaves but writes will not be allowed until the master is restored ... thousands of dollars in lost revenue. -RG rlgarris Richard Garris Currently automatic switching from
13

Finance data from SQL Server into ObjectDB daily

feedback from the community to see if I'm thinking about it right. We have a finance data mart that is appended to daily via an SSIS package. I would like to pull the data from SQL, add it to a bean ... ? Is there a way to map the structure of the table directly into ObjectDB from SQL Server? Thanks. ExpII
13

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
13

Query becomes slower on moving from ObjectDB 1.x to ObjectDB 2.x

to an existing database, but it could be also some issue with the conversion from 1.x to 2.x. To activate ... it and let you know. I will use the following command after i convert from 1.x to 2.x String ... to do to solve this ? binitbhaskar Binit Bhaskar You didn't mention step 4 from post #9
13

migration path from JPA / Hibernate

when using Entities previously geared towards JPA / Hibernate migrating data from existing relational ... writing a small JPA program that retrieves entity objects from Hibernate, detaches ... the future. support Support Thanks for the detailed answers! > retrieves entity objects from Hibernate
13

How to define database structure and insert some initial objects from scratch

Hi from Spain! We're evaluating ObjectDB and we have some questions: - How can we create ... need initial structure like tables, but how can we populate some "tables" with initial data from ... jdbc driver for ETL software like Kettle? How about migrating data from another database
13

Navigation through lazy loading from Detached Objects

) is: Retrieval by navigation from detached objects is not supported, so only persistent fields ... : on accessing lazy loaded relationships outside a transaction, after a query, from Glassfish forum thread ... extension in ObjectDB would ease emigration of web applications from EclipseLink to ObjectDB

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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