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

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

String

toString()

Methods inherited from class java.lang.Object

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

Field Detail

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 Detail

toString

public String toString()

Overrides:

toString in class Object