org.apache.derby.impl.sql.execute

Class RISetChecker

java.lang.Object

org.apache.derby.impl.sql.execute.RISetChecker

public class RISetChecker
extends java.lang.Object

Checks a set or referential integrity constraints. Used to shield the caller from ReferencedKeyRIChecker and ForeignKeyRICheckers.

Constructor Summary

Constructors

Constructor and Description
RISetChecker(LanguageConnectionContext lcc, TransactionController tc, FKInfo[] fkInfo)

Method Summary

Modifier and Type	Method and Description
void	close() clean up
void	doFKCheck(Activation a, ExecRow row) Check that everything in the row is ok, i.e.
void	doPKCheck(Activation a, ExecRow row, boolean restrictCheckOnly, int deferredRowReq) Check that there are no referenced primary keys in the passed in row.
void	doRICheck(Activation a, int index, ExecRow row, boolean restrictCheckOnly, int deferredRowReq) Execute the specific RI check on the passed in row.
void	postCheck()
void	postCheck(int index)

Methods inherited from class java.lang.Object

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

Constructor Detail

RISetChecker

public RISetChecker(LanguageConnectionContext lcc,
                    TransactionController tc,
                    FKInfo[] fkInfo)
             throws StandardException

Parameters:

lcc - the language connection context

tc - the xact controller

fkInfo - the foreign key information

Throws:

StandardException - Thrown on failure

Method Detail

doPKCheck

public void doPKCheck(Activation a,
                      ExecRow row,
                      boolean restrictCheckOnly,
                      int deferredRowReq)
               throws StandardException

Check that there are no referenced primary keys in the passed in row. So for each foreign key that references a primary key constraint, make sure that there is no row that matches the values in the passed in row.

Parameters:

a - The activation

row - The row to check

restrictCheckOnly - true if the check is relevant only for RESTRICTED referential action.

deferredRowReq - For referenced keys: The required number of duplicates that need to be present. Only used if postCheck==false.

Throws:

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

postCheck

public void postCheck()
               throws StandardException

Throws:

StandardException

postCheck

public void postCheck(int index)
               throws StandardException

Throws:

StandardException

doFKCheck

public void doFKCheck(Activation a,
                      ExecRow row)
               throws StandardException

Check that everything in the row is ok, i.e. that there are no foreign keys in the passed in row that have invalid values.

Parameters:

a - the activation

row - the row to check

Throws:

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

doRICheck

public void doRICheck(Activation a,
                      int index,
                      ExecRow row,
                      boolean restrictCheckOnly,
                      int deferredRowReq)
               throws StandardException

Execute the specific RI check on the passed in row.

Parameters:

a - the activation

index - index into fkInfo

row - the row to check

restrictCheckOnly - true if the check is relevant only for RESTRICTED referential action.

deferredRowReq - For referenced keys: the required number of duplicates that need to be present. Only used if postCheck==false.

Throws:

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

close

public void close()
           throws StandardException

clean up

Throws:

StandardException - on error