org.apache.derby.impl.sql.execute

Class ReferencedKeyRIChecker

java.lang.Object

org.apache.derby.impl.sql.execute.GenericRIChecker

org.apache.derby.impl.sql.execute.ReferencedKeyRIChecker

public class ReferencedKeyRIChecker
extends GenericRIChecker

A Referential Integrity checker for a change to a referenced key (primary or unique). Makes sure that all the referenced key row is not referenced by any of its foreign keys. see ForeignKeyRIChecker for the code that validates changes to foreign keys.

Field Summary

Fields inherited from class org.apache.derby.impl.sql.execute.GenericRIChecker

fkDcocis, fkInfo, fkScocis, refDcoci, refScoci, tc

Constructor Summary

Constructors

Constructor and Description
ReferencedKeyRIChecker(TransactionController tc, FKInfo fkinfo)

Method Summary

Modifier and Type	Method and Description
(package private) void	doCheck(ExecRow row, boolean restrictCheckOnly) Check that the row either has a null column(s), or has no corresponding foreign keys.

Methods inherited from class org.apache.derby.impl.sql.execute.GenericRIChecker

close, doCheck, getRICheckIsolationLevel, getScanController, isAnyFieldNull

Methods inherited from class java.lang.Object

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

Constructor Detail

ReferencedKeyRIChecker

ReferencedKeyRIChecker(TransactionController tc,
                       FKInfo fkinfo)
                throws StandardException

Parameters:

tc - the xact controller

fkinfo - the foreign key information

Throws:

StandardException - Thrown on failure

Method Detail

doCheck

void doCheck(ExecRow row,
             boolean restrictCheckOnly)
      throws StandardException

Check that the row either has a null column(s), or has no corresponding foreign keys.

If a foreign key is found, an exception is thrown. If not, the scan is closed.

Specified by:

doCheck in class GenericRIChecker

Parameters:

row - the row to check

Throws:

StandardException - on unexpected error, or on a primary/unique key violation