About delete

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Server User List

" ip="127.0.0.1" admin="true">
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Database Explorer

window) and then pasted on a reference that has to be set. The functionality of the Edit > Delete command depends on the context. Deleting a reference field sets the value to null without deleting any referenced entity object. On the other hand, deleting an entity object that is represented by a child
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Working with JPA Entity Objects [2011-04-18]

requires using entity objects for many operations, including storing, retrieving, updating and deleting ... . A managed entity object can also be retrieved from the database and marked for deletion, by using ... Managed to Removed, and is physically deleted from the database during commit. More details on object
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Working with JPA Entity Objects

requires using entity objects for many operations, including storing, retrieving, updating and deleting ... . A managed entity object can also be retrieved from the database and marked for deletion, by using ... Managed to Removed, and is physically deleted from the database during commit. More details on object
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14

JPA Query Structure (JPQL / Criteria)

(update and delete queries have a slightly different form). The other JPQL clauses, WHERE, GROUP BY, HAVING and ORDER BY are optional. The structure of JPQL DELETE and UPDATE queries is simpler: DELETE
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Chapter 1 - Quick Tour [2010-10-29]

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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11

Database Connection using JPA

. drop - for deleting any existing database content (useful for tests). To connect to an ObjectDB server ... ); EntityTransaction Operations that affect the content of the database (store, update, delete
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Database Connection using JPA [2011-08-30]

. drop - for deleting any existing database content (useful for tests). To connect to an ObjectDB server ... ); EntityTransaction Operations that affect the content of the database (store, update, delete
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SELECT clause (JPQL / Criteria API) [2013-03-11]

objects, transparent update detection, support for delete, etc. Query results are not limited to entity ... efficiently. They are less productive with operations that update or delete entity objects, in
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Locking in JPA [2011-04-30]

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