About WHERE

release

2.7.1

... NullPointerException when using AND TRUE in WHERE clause (issue #201). Fixed an exception when accessing an ...

 
manual

[ODB1] Chapter 2 - A Quick Tour

Demonstrates basic database programming using ObjectDB. ... implementation of the PersistenceCapable interface, where necessary, at the byte code level. When this process is completed the ...

 
manual

[ODB1] Chapter 9 - ObjectDB Explorer

Explains how to view and manipulate database files in the database explorer. ... when working with classes with a large number of fields where displaying all the fields is problematic (for instance, in a row in the ...

 
manual

[ODB1] Chapter 5 - JDO Connections

The PersistenShows how to use database connections and transactions in JDO. ceManagerFactory interface represents a factory of database connections. Its main role is to provide PersistenceManager instances. The PersistenceManager interface represents a database connection. Every operation on a database requires a PersistenceManager instance. The Transaction interface represents a transaction on a database. Every operation that modifies the content of the database requires an active transaction.[toc hidden:1]... only difference between the two modes is in performance, where the default true value is expected to be slightly more efficient. ...

 
release

2.7.0

... NullPointerException when using AND TRUE in WHERE clause (issue #201). Fixed an exception when accessing an ...

 
issue

Unexpected Exception during commit

I'm testing code that otherwise has been working with a clean database. I have seen several examples of the following exception. It never seems to happen in the same place twice, though. If you can give me a hint as to what would internally cause this, I'll try to reproduce it. Carl   ... access or alter even a single item. Is that true? In cases where I have a large number of entities that are not used as a collection, I ...

 
manual

[ODB1] Chapter 7 - JDOQL Queries

Explains how to use JDOQL, the Java/JDO Query Language.... and two collection methods ( contains and isEmpty , where isEmpty() also returns true when invoked on a null value). ...

 
issue

ArrayIndexOutOfBoundsException on flush

The following exception was thrown when my app attempted to flush an objectdb database: ... and many problems in early versions of ObjectDB 2.x where related to managing large objects. Do you use update queries? ...

 
forum_thread

Possible cause for "Enhancement of type ... is old and cannot be used"

We get the following log: ... is old and cannot be used ... Where BooleanValue is a generic, "deep" value-wrapper entity class. I ...

 
forum_thread

Unable to convert 1.x odb file to 2.x

Hi, my company is just about to switch from ObjectDB 1.04.2487 (SE) to ObjectDB 2. So I downloaded the objectdb-2.5.5_02, activated it with our licence, enhancing went well, but then on converting 1 of the DB files I got this error: ... in a map I will solve via some migration to a structure where the value in the map will be a user defined class containing the array. ...