About modified

release

2.4.6

... Fixed a critical bug in schema evolution of modified ancestor classes. Fixed a bug in handling indexes in a ...

 
release

2.5.0

... Fixed a critical bug in schema evolution of modified ancestor classes. Fixed a bug in handling indexes in a ...

 
release

2.2.3

... Fixed a critical bug in schema evolution of modified ancestor classes. Fixed a bug in handling indexes in a ...

 
release

2.5.1

... Fixed a critical bug in schema evolution of modified ancestor classes. Fixed a bug in handling indexes in a ...

 
forum_thread

alter table

Hi: After a table built by real data, how to alter table structure, such as: alter table add column ... alter table add index ... TIA ... I want to know how the command use the modified class (with @index), it has no knowledge about the .java or .class ... > I want to know how the command use the modified class (with @index), it has no knowledge about the .java or .class ...

 
forum_thread

Optimization Question

One of our uses for your ObjectDB software is in maintaining the current state of a large number of data objects called tracks. These tracks change very frequently over time (every 10-15 seconds is not unreasonable), but they are also very large complex data structures so it's extremely difficult to identify exactly what fields have changed from one update to the next. Currently the following sequence executes when a track update comes in: - If it’s a new track simply add it to the database.... If you still want to try updating only the modified objects, maybe the new merge feature of ObjectDB 2.0 RC1 can help. ... internally to determine if a merged object has been modified. Still, you will have to manage the object IDs in order to merge a ...

 
manual

JPA Entity Fields

Explains how to define and use primary keys in JPA, including composite and embedded primary keys.... is 1. For every transaction in which an entity object is modified its version number is automatically increased by one. Version fields ...

 
release

2.4.7

... Fixed a critical bug in schema evolution of modified ancestor classes. Fixed a bug in handling indexes in a ...

 
manual

GROUP BY and HAVING clauses

Explains how to use the GROUP BY and HAVING clauses in a JPA/JPQL query. The GROUP BY clause enables grouping of query results. A JPQL query with a GROUP BY clause returns properties of generated groups instead of individual objects and fields. The position of a GROUP BY clause in the query execution order is afte ...

 
release

2.5.2

... Fixed a critical bug in schema evolution of modified ancestor classes. Fixed a bug in handling indexes in a ...