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java.lang.Objectcom.sleepycat.db.ForeignKeyDeleteAction
public class ForeignKeyDeleteAction
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
.
SecondaryConfig
Field Summary | |
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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 | |
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String |
toString()
|
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Field Detail |
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public static ForeignKeyDeleteAction ABORT
DatabaseException
.
public static ForeignKeyDeleteAction CASCADE
public static ForeignKeyDeleteAction NULLIFY
Method Detail |
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public String toString()
toString
in class Object
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