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Forum
18

Duplicate a table

Hello, I would like to know if it's possible to copy the content of a table representing one class of object to another table whithout having to use java object (no object instantiation) ? In fact, I ... a table before erasing the content. Thanks. You will have to write code for this purpose. Use enhanced
Forum
18

enumeration table? how to on pure jpa?

Hello , I've relational db , and there is some table named enumerations with , some key and values ... application configs. Like; tablename : enumeration table rows: key            value servername ... @Table(name="enumerations") public class Enumerations { //Field binding possible like
Forum
18

Populating JavaFx table from ObjectDB

Please I have being working on an application, and I am experiencing some challenges populating my javaFx table from ObjectDB, Please I don't know if I can get a sample code for populating javaFx table from ObjectDB that could aid my Project. You may check the following links: https://ajimenezr
Forum
17

'DROP TABLE' in ODB?

Let's say I no longer need some entity in my project and after deleting all the objects of this type in database I want to remove this type from schema. How can I do this? Is there something like SQL 'drop table' in ODB? This is currently not supported. As far as I understand the main effect
Forum
17

Field or Table Encryption

Is there a build-in way to encrypt object fields or entire "tables" with annotations?  If not, are there any recommended design patterns? Thanks Please see this feature request in the issue tracking. If you need selective encryption of types / fields - please describe your suggestion in that issue thread. mrbahr2003
Forum
17

impossible to drop a table with 50 million objects

when trying to execute in explorer (max heap size 1GByte) delete from LogEntry l it comes up with a Java heap error after 20 minutes of executing. How to empty such a table ?     This may be because the transaction size is limited by the heap size. You can try deleting these objects in batches
JPA Doc
16

javax.persistence.JoinColumn

@JoinColumn(name="CUST_ID") // join column is in table for Order public Set ... . (Optional) The name of the foreign key column. The table in which it is found depends upon the context ... , the foreign key column is in the table of the source entity or embeddable. If the join is for a unidirectional
JPA Doc
16

javax.persistence.JoinTable

the mapping of associations. It is specified on the owning side of an association. A join table ... -to-one relationships, and one-to-one associations (both bidirectional and unidirectional). When a join table ... of the join table is assumed to be the table names of the associated primary tables concatenated
Manual
16

JPA Query Structure (JPQL / Criteria)

is that SQL works with relational database tables, records and fields, whereas JPQL works with Java ... rather than just field values from database tables, as with SQL. That makes JPQL more object oriented friendly
Result
16

ObjectDB - Object Database for Java (JPA/JDO)

database driven application in Eclipse or NetBeans. Forget relational databases, JDBC, drivers, tables ... objects and flat database table rows. Object Relational Mapping (ORM) tools can reduce some manual work