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Database Connection using JPA

server mode. drop - for deleting any existing database content (useful for tests). To connect ... (properties); EntityTransaction Operations that affect the content of the database (store, update, delete
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Locking in JPA

that has to be updated or deleted is checked. An exception is thrown if it is found out that an update ... deleted, and compares the version number of that object in the database to the version number
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Chapter 1 - Quick Tour

ObjectDB databases and perform basic CRUD operations (Create/Store, Retrieve, Update and Delete ... , retrieving, updating and deleting Point objects. To run the sample program of this chapter in
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JPA Lifecycle Events

the EntityManager. @PostRemove - after deleting an entity from the database (during commit or flush). An entity
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FROM clause (JPQL / Criteria API)

,DELETE, DESC, DISTINCT, ELSE, EMPTY, END, ENTRY, ESCAPE, EXISTS, FALSE, FETCH,FROM, GROUP, HAVING, IN
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Privacy Policy

, while Session Cookies are deleted as soon as You close Your web browser. We use both Session
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How to install ObjectDB?

ObjectDB is distributed as a zip file. Just download and extract the ObjectDB distribution zip file. No need to run any install or setup program. You can uninstall ObjectDB by deleting the ObjectDB directory. ObjectDB does not modify the registry or any other system file.
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javax.jdo.Query

() Deletes all the instances of the candidate class that pass the filter. Deletes all the instances ... that were deleted, specifically not including the number of dependent and embedded instances. Dirty ... cycle changes as if deletePersistent were called on them. Specifically, if the class of deleted
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javax.jdo.JDOEntityManager

statement, e.g., for update or delete. Create an instance of Query for executing a native SQL statement, e.g., for update or delete. Parameters: sqlString - a native SQL query string Returns: the new ... ) Delete the persistent instance from the data store. Delete the persistent instance from the data
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ObjectDB 1.0 Manual

and delete database objects. Chapter 7 - JDOQL Queries Describes JDOQL, the JDO Query Language. The last

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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