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org.apache.derby.impl.sql.execute
Class ForeignKeyRIChecker  

java.lang.Object
  org.apache.derby.impl.sql.execute.GenericRIChecker
      org.apache.derby.impl.sql.execute.ForeignKeyRIChecker

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public class ForeignKeyRIChecker

extends GenericRIChecker

A Referential Integrity checker for a foreign key constraint. It makes sure the foreign key is intact. This is used for a change to a foreign key column. see ReferencedKeyRIChecker for the code that validates changes to referenced keys.

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Field Summary

 

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

fkDcocis, fkInfo, fkScocis, refDcoci, refScoci, tc

 

Constructor Summary
(package private)	ForeignKeyRIChecker(org.apache.derby.iapi.store.access.TransactionController tc, FKInfo fkinfo)

 

Method Summary
(package private)  void	doCheck(org.apache.derby.iapi.sql.execute.ExecRow row, boolean restrictCheckOnly)           Check that the row either has a null column(s), or corresponds to a row in the referenced key.
(package private)  int	getRICheckIsolationLevel()           Get the isolation level for the scan for the RI check.

 

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

close, doCheck, getScanController, isAnyFieldNull

 

Methods inherited from class java.lang.Object

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

 

Constructor Detail

ForeignKeyRIChecker

ForeignKeyRIChecker(org.apache.derby.iapi.store.access.TransactionController tc,
                    FKInfo fkinfo)
              throws org.apache.derby.iapi.error.StandardException

Method Detail

doCheck

void doCheck(org.apache.derby.iapi.sql.execute.ExecRow row,
             boolean restrictCheckOnly)
       throws org.apache.derby.iapi.error.StandardException

Check that the row either has a null column(s), or corresponds to a row in the referenced key.

If the referenced key is found, then it is locked when this method returns. The lock is held until the next call to doCheck() or close().

Specified by:

doCheck in class GenericRIChecker

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getRICheckIsolationLevel

int getRICheckIsolationLevel()

Get the isolation level for the scan for the RI check. NOTE: The level will eventually be instantaneous locking once the implemenation changes.

Overrides:

getRICheckIsolationLevel in class GenericRIChecker

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Overview  Package   Class  Use  Deprecated  Index
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