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9

500Mb ObjectDb database opening issue

ObjectDB just read the database file header). To some extent it is affected by the number of persistent
9

Inserted entities with strings as keys and indices needs more and more ram memory in comparing to primitive integers as keys and indices

with string types. @Index @Basic long step; btc_es BTC EmbeddedSystems To some extent, yes
9

ObjectDB 2.6.9_06 (embedded): Cascading merge resulting in duplicate objects

, the database contains two new entries in the Address extent, i.e. there is a duplicate entity that is not
9

Global way to set Lazy-loading fetch functionality for all the fields

Ouba Mahamane Lazy / Eager can only be set locally per relationship, and for some extent also per query (using JOIN FETCH). support Support
9

DB reading fails in debug mode in Eclipse

"/> </package> </jdo> As you can see the classes are not embedded, so they have their own extent
9

objectdb-2.6.9_02 (with "objectdb.temp.no-enhancement-crc-check") vs. generic classes with interfaces: detailed investigation

with ObjectDB may work to some extent. You can use a generics class parameter as the type
9

Post-compilation enhancement vs Automatic Run-time enhancement

the same code modifications. There may be a difference with the extent of enhanced code. Automatic
1

queries more than 10 times slower using 2.8.1 versus 2.7.6

it could may be possible to some extent, but it would be difficult to guarantee exactly the same behaviour
1

ObjectDB 2.7.4

Fixed a bug in persisting objects with same ids in a class hierarchy in one transaction. Fixed a bug in using JDO Extent of a super class with shared primary key values in subclasses. Added a warning if a JDO SingleFieldIdentity class is used as a primary key field type.
1

ObjectDB-2.6.9: Failed to commit transaction: Failed to set numeric value of field property Element.id using reflection

with ObjectDB may work to some extent. You can use a generics class parameter as the type of a persistent field

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.

Need Help?

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