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7

Schema Update

Explains how to handle JPA/JDO database schema evolution in ObjectDB.
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Spring Data JPA

Hello! When i configure Spring Data JPA to use ObjectDB 2.4.0_03 i get an exception ... ) at org.springframework.data.jpa.repository.support.JpaEntityInformationSupport.getMetadata(JpaEntityInformationSupport.java:56) at org.springframework.data.jpa.repository.support.JpaRepositoryFactory
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Exporting the data out of the ObjectDB

system. However we want to work on one of the aspects that is the data should be able to pulled out of the ObjectDB to some sort of Big Data File system or Relation DB for reporting / analytics ... our OLTP to be affected by data intensive reporting and analytics requirements. This could be handled
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em.flush(); em.clear(); loosing data and not persisting managed objects

is larger than about 45 bytes is much less efficient. support Support I"m storing data from files ... ). These tables are the data from the backend of an antiquated source code/bug tracking management system called CMVC, since I don't have direct access to that database to get the data directly. The code
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Missing Data on Retrieval (0, null values)

contains all necessary Data. Most of the others contains all Object-Rows', but most Values of the Columns ... ). support Support The Data is even missing in the resultlist without any Export-Function. A little ... accessing the fields directly) then you must make sure that data is fetched from the database before
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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 ... to retrieve data from RDBMS tables and then use the same JPA entity classes to store the data in
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Spring Data JPA - PersistenceException thrown

.data.jpa.repository.config.JpaMetamodelMappingContextFactoryBean.getMetamodels(JpaMetamodelMappingContextFactoryBean.java:90) at org.springframework.data.jpa.repository.config ... .data.jpa.repository.config.JpaMetamodelMappingContextFactoryBean.createInstance
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ObjectDB data migration/extraction

Hi What is the way to extract data from ObjectDB to relational databases (Oracle). We need to feed an Oracle database with data for reporting/datawarehosing. Should JPQL be used or is there some ... , so you will have to migrate data using your own code. Notice that you should be able to use ObjectDB with BIRT to produce
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Data portability

Hi, I've never used an OODB, I'm looking for a starting point but a recurrent concern is the Data Portability one. More clear: what options / strategies do I have to export / move my data ... (based on JPA/JDO standards), but what about Data Portability? Regards, lorenzo.sm Lorenzo Solano
7

index - data rewrite

Hi we have found that applying indexes on an existing table erases the data. Are we doing ... carefully if data is missing (very unlikely) or queries fail to return results (possible if a new ... )? What data is missing? Complete objects? specific fields in objects? fields related to the new index

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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