Fast Object Database for Java - with JPA/JDO support

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70

JDO Annotations for Fetch Settings

All about JDO Annotations for Fetch Settings in Java/JPA database - explanations, examples, references, links and related information.
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setResult(data)

Method javax.jdo.Query void setResult( String data ) Specifies what type of data this query should return. If this is unset or set to null, this query returns instances of the query's candidate class. If set, this query will return expressions, including field values (projections) and aggregate
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Server Configuration

system permissions have to be set on the data directory, its subdirectories and database files, to enable ... The configuration element specifies settings for running an ObjectDB Server. The server ... : <data path="$objectdb/db-files
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[ODB1] Chapter 8 - ObjectDB Server

more sub elements, indicating which paths under the server data directory (as set by the data ... this setting using the –port command line option to specify another port, as shown below: > java ... configuration file with one registered user: <data
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JPA and handling large data sets

. But exporting large binary data sets is very slow. To avoid memory problems the binary data type is read step by step during the export with the query/setFirstResult() & setMaxResults(). But for large data sets the way is slow. We have an own entity for storing binary data (pictures, documents). Hint
28

Server User List

and specifies their specific settings (username, password, permissions, quota). The default ... ") specifies if the user is a superuser. A superuser is authorized to manage server settings using ... definition. All the settings of that master definition are automatically inherited by all the other user
28

Database Explorer

to view data in ObjectDB databases, execute JPQL and JDOQL queries and edit the content of databases ... the shell file, setting the paths to the objectdb.jarfile and to the JVM). Connecting ... provides two types of viewer windows for viewing the database data. The Table window follows
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BIRT/ODA ObjectDB Driver

Tools (BIRT) that adds support of ObjectDB as a data source and JPQL as a data set query language ... Sets and JPQL To create the data set: Open the [New Data Set] dialog box by right clicking the Data Sets node in the [Data Explorer] window and selecting New Data Set. Select an ObjectDB data source
22

[ODB1] Chapter 9 - ObjectDB Explorer

. This type of viewer is useful for viewing the data of a simple object model. In most cases ... of a database. Section 9.5 explains how to define views and set other options that affect viewer windows ... windows using the "File | Refresh Data" menu command. 9.3 Editing the Database The Explorer is usually
22

join(set, jt)

Method javax.persistence.criteria.From SetJoin join( SetAttribute set, JoinType jt ) Create a join to the specified Set-valued attribute using the given join type. Parameters: set - target of the join jt - join type Returns: the resulting join Since: JPA 2.0

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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