Package com.sleepycat.db

Class ForeignKeyDeleteAction

java.lang.Object

com.sleepycat.db.ForeignKeyDeleteAction

public class ForeignKeyDeleteAction
extends Object

The action taken when a referenced record in the foreign key database is deleted.

The delete action applies to a secondary database that is configured to have a foreign key integrity constraint. The delete action is specified by calling SecondaryConfig.setForeignKeyDeleteAction(com.sleepycat.db.ForeignKeyDeleteAction).

When a record in the foreign key database is deleted, it is checked to see if it is referenced by any record in the associated secondary database. If the key is referenced, the delete action is applied. By default, the delete action is ABORT.

See Also:

• SecondaryConfig

Field Summary

Fields

Modifier and Type	Field	Description
static ForeignKeyDeleteAction	ABORT	When a referenced record in the foreign key database is deleted, abort the transaction by throwing a DatabaseException.
static ForeignKeyDeleteAction	CASCADE	When a referenced record in the foreign key database is deleted, delete the primary database record that references it.
static ForeignKeyDeleteAction	NULLIFY	When a referenced record in the foreign key database is deleted, set the reference to null in the primary database record that references it, thereby deleting the secondary key.

Method Summary

Modifier and Type	Method	Description
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Details

ABORT

public static ForeignKeyDeleteAction ABORT

When a referenced record in the foreign key database is deleted, abort the transaction by throwing a DatabaseException.

CASCADE

public static ForeignKeyDeleteAction CASCADE

When a referenced record in the foreign key database is deleted, delete the primary database record that references it.

NULLIFY

public static ForeignKeyDeleteAction NULLIFY

When a referenced record in the foreign key database is deleted, set the reference to null in the primary database record that references it, thereby deleting the secondary key. @see ForeignKeyNullifier @see ForeignMultiKeyNullifier

Method Details

toString

public String toString()

Overrides:

toString in class Object