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Paths and Types in JPQL and Criteria API

, and they can be used in ordering. Navigation through Path Expressions A path expression always starts ... and also serve as a starting point for building more complex paths through navigation. Giving a Path instance

Database Explorer

, when the Explorer starts it tries to open a connection to the most recently used database ... when the Explorer starts. The [Table (instead of Tree) as a default viewer window] check box specifies

combined index not used

the threshold from 1024 combinations to 10000 solves this issue so a quick fix is possible ... contest and selected. This issue requires further analysis and work, but in order to offer a quick ... time you may be able to manually select the best query plans for these queries as a quick workaround

JPA Lifecycle Events

follows the definition order. Internal callback methods are invoked starting at the top level entity class

Database Management Settings

as the background index activation is completed, ObjectDB can start using the new indexes

SELECT clause (JPQL / Criteria API)

Country AS c WHERE c.name LIKE 'I%' Both Italy and Ireland (whose name starts with 'I') use Euro as

Database Replication and Clustering

, under the server data root directory. Starting a new replication of an existing master database

Step 3: Add a Context Listener Class

if not existing yet) when the web application starts, by instantiating an EntityManagerFactory ... attribute in the servlet context - when the web application starts (contextInitialized). Retrieves

Report Generation with BIRT and JPA

This tutorial demonstrates how to create reports based on data in an ObjectDB database using the popular open source Business Intelligence and Reporting Tools (BIRT). In order to keep things as simple as possible - we will use the basic points.odb ObjectDB database file from the Getting Started

[ODB1] Chapter 5 - JDO Connections

transactions. A transaction is started by a call to begin() and ended by a call to commit() or rollback ... are applied to the database is not acceptable. Before commit() starts writing to the database it stores

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.

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