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JPA Query Structure (JPQL / Criteria)

classes and objects. For example, a JPQL query can retrieve and return entity objects ... insensitive. JPQL keywords, for example, can appear in queries either in upper case (e.g. SELECT) or in
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JPA / JDO Class Enhancer

.jar as a Java agent. For example, if objectdb.jar is located at c:\objectdb\bin, the JVM ... on Sun JDK 6 or above (and not on JRE 6 for example). Second, classes that are loaded into the JVM
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Query Parameters in JPA

the above example, a comparison of :name to a field whose type is String indicates that the type ... of date and time, as explained in detail in the Date and Time (Temporal) Types section. For example
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Eclipse Public License - v 1.0

responsibility to secure any other intellectual property rights needed, if any. For example ... . For example, a Contributor might include the Program in a commercial product offering, Product X
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JPA Criteria API Queries

API may be preferred. For example, building a dynamic query based on fields that a user fills ... are equivalent). In the example above a CriteriaQuery instance is created for representing
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JPA Persistence Unit

. The required name attribute (“my-pu” in the example) identifies the persistence unit when instantiating ... are available only when the containing classes become known to ObjectDB, for example when a first instance of the class is stored in the database.
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Criteria Query From Elements

and its descendant interfaces: See the FROM in Criteria Queries section for more details and examples. Join Fetch Elements Join Fetch is managed in criteria queries by the following interfaces: See the FROM in Criteria Queries section for more details and an example.
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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 ... ) on ObjectDB databases. The example program that this chapter presents manages a simple database
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Database Server

, which is much more efficient. As a result, embedded mode should be preferred when possible. For example ... and the restart server commands). For example: > server.exe -client -Xmx256m -port 6666 Explicitly specified
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[ODB1] Chapter 2 - A Quick Tour

in section 6.3. If such an ArrayList is not found in the database (on the first run for example ... that represent database objects (like list in this example) are called persistent objects. An object

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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