About store

faq

What is ObjectDB?

... processing, etc.), but it uses an object oriented model to store and manage data. You can easily store directly ordinary objects (and graphs of objects) in an ObjectDB ...

 
forum_thread

mismatch after Enum changes

Hi, I have an entity, an attribute is a enum type: public enum MyEnum { AA, BB, CC, DD; } I populated the database, than I changed the enum types deleting some unused types (es. AA) without reset database:   #1 2016-01-28 11:07 Hi, I have an entity, an attribute is a enum type: public enum MyEnum { AA, BB, ...

 
api-jdo

Column.length

Maximum length of data stored in this column.(Annotation Element of javax.jdo.annotations.Column)

 
api-jdo

getObjectId(pc)

Return a copy of the JDO identity associated with the parameter instance.(Static Method of javax.jdo.JDOHelper)

 
api-jdo

setSynchronization(sync)

The user can specify a Synchronization instance to be notified on transaction completions.(Method of javax.jdo.Transaction)

 
api-jpa

TableGenerator.pkColumnValue

(Optional) The primary key value in the generator table that distinguishes this set of generated values from others that may be stored in the table.(Annotation Element of javax.persistence.TableGenerator)

 
forum_thread

Query to search for common elements in two separate collections.

I'm trying to work out the most efficient way to build a query that can compare two collections for identical members. Something like: "SELECT o FROM Object o WHERE o.someCollection CONTAINS MEMBER OF :someCollection" Is something like this possible in the JPA spec? #1 2013-01-12 10:42 I'm trying to work out the most efficient way to build a query that can compare two collections for identical ...

 
api-jdo

getConnectionFactoryName()

Get the name for the data store connection factory.(Method of javax.jdo.PersistenceManagerFactory)

 
api-jdo

fetchFloatField(fieldNumber)

Fetch one field from the field manager.(Method of javax.jdo.spi.PersistenceCapable.ObjectIdFieldSupplier)

 
api-jdo

setConnectionFactoryName(connectionFactoryName)

Set the name for the data store connection factory.(Method of javax.jdo.PersistenceManagerFactory)