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ObjectDB Object Database Features

(requires login). Performance and Speed ObjectDB is extremely fast - much faster than any other JPA ... performance by avoiding reflection and by using smart tracking. Non enhanced classes are also supported (by
Manual
12

SELECT clause (JPQL / Criteria API)

. Specifying the required query results more precisely can improve performance and in some cases ... filters duplicate results. Filtering duplicate results might have some effect on performance
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Apache License, Version 2.0, January 2004

of, publicly display, publicly perform, sublicense, and distribute the Work and such Derivative
Manual
8

Chapter 1 - Quick Tour

This chapter demonstrates basic ObjectDB and JPA concepts by introducing a simple example program. After reading this chapter you should be able to write basic programs that create, open and close ObjectDB databases and perform basic CRUD operations (Create/Store, Retrieve, Update and Delete
Manual
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Database Server

. For instance, you can increase the maximum JVM heap size and improve performance by using HotSpot JVM
Manual
8

GROUP BY and HAVING clauses

.continents GROUP BY c.currency Because grouping is performed in this query on a path expression
Manual
8

JPA Entity Fields

, such as Hibernate, using property access may have some performance benefits. This is not the case
Manual
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JPA Primary Key

performance: @Entity public class Event { @EmbeddedId EventId id; : } @Embeddable
Tutorial
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Step 3: Add a Context Listener Class

The Guest entity objects will be stored in an ObjectDB database, which will be represented by a JPA's EntityManagerFactory instance with a global application scope. We have to register a ServletContextListener to perform initialization and cleanup operations: The database will be opened (or created
Tutorial
8

Step 3: Add a Context Listener Class

The Guest entity objects will be stored in an ObjectDB database, which will be represented by a JPA's EntityManagerFactory instance with a global application scope. We have to register a ServletContextListener to perform initialization and cleanup operations: The database will be opened (or created