org.apache.derby.impl.sql.execute

Class DeleteResultSet

java.lang.Object

org.apache.derby.impl.sql.execute.NoRowsResultSetImpl

org.apache.derby.impl.sql.execute.DMLWriteResultSet

org.apache.derby.impl.sql.execute.DeleteResultSet

All Implemented Interfaces:

ResultSet

Direct Known Subclasses:

DeleteCascadeResultSet

 class DeleteResultSet
extends DMLWriteResultSet

Delete the rows from the specified base table. This will cause constraints to be checked and triggers to be executed based on the c's and t's compiled into the insert plan.

Field Summary

Fields

Modifier and Type	Field and Description
private FormatableBitSet	baseRowReadList
protected boolean	cascadeDelete
(package private) DeleteConstantAction	constants
protected ConglomerateController	deferredBaseCC
(package private) ExecRow	deferredBaseRow
(package private) ExecRow	deferredRLRow
(package private) ExecRow	deferredSparseRow
private boolean	firstExecute
private RISetChecker	fkChecker
protected FKInfo[]	fkInfoArray
(package private) int	lockMode
private boolean	noTriggersOrFks
(package private) int	numberOfBaseColumns
(package private) int	numIndexes
private int	numOpens
protected RowChanger	rc
protected ResultDescription	resultDescription
private int	rlColumnNumber
private ExecRow	row
protected TemporaryRowHolderImpl	rowHolder
(package private) NoPutResultSet	savedSource
protected NoPutResultSet	source
private TransactionController	tc
private TriggerEventActivator	triggerActivator
private TriggerInfo	triggerInfo

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

baseRowReadMap, constantAction, heapDCOCI, indexDCOCIs, rowCount, streamStorableHeapColIds

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

activation, beginExecutionTime, beginTime, endExecutionTime, endTime, lcc

Fields inherited from interface org.apache.derby.iapi.sql.ResultSet

CURRENT_RESULTSET_ONLY, ENTIRE_RESULTSET_TREE, ISAFTERLAST, ISBEFOREFIRST, ISFIRST, ISLAST

Constructor Summary

Constructors

Constructor and Description
DeleteResultSet(NoPutResultSet source, Activation activation)
DeleteResultSet(NoPutResultSet source, ConstantAction passedInConstantAction, Activation activation) REMIND: At present this takes just the conglomerate id of the table.

Method Summary

Methods

Modifier and Type	Method and Description
void	cleanUp() Tells the system to clean up on an error.
(package private) boolean	collectAffectedRows()
(package private) NoPutResultSet	createDependentSource(RowChanger rc) create a source for the dependent table Delete Cascade ResultSet class will override this method.
(package private) void	deleteDeferredRows()
void	finish() Tells the system that there will be no more access to any database information via this result set; in particular, no more calls to open().
(package private) void	fireAfterTriggers()
(package private) void	fireBeforeTriggers()
ResultDescription	getResultDescription() Returns the description of the deleted rows.
void	open() Needs to be called before the result set will do anything.
(package private) void	runFkChecker(boolean restrictCheckOnly)
(package private) void	setup() Set up the result set for use.

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

decodeLockMode, getIndexNameFromCID, getNextRowCore, makeDeferredSparseRow, modifiedRowCount

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

addWarning, checkRowPosition, clearCurrentRow, close, doesCommit, evaluateACheckConstraint, evaluateCheckConstraints, evaluateGenerationClauses, getAbsoluteRow, getActivation, getAutoGeneratedKeysResultset, getBeginExecutionTimestamp, getCurrentTimeMillis, getCursorName, getEndExecutionTimestamp, getExecuteTime, getFirstRow, getLastRow, getNextRow, getPreviousRow, getQueryPlanText, getRelativeRow, getRowNumber, getSubqueryTrackingArray, getTimeSpent, getWarnings, isClosed, returnsRows, setAfterLastRow, setBeforeFirstRow

Methods inherited from class java.lang.Object

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

Field Detail

tc

private TransactionController tc

constants

DeleteConstantAction constants

resultDescription

protected ResultDescription resultDescription

source

protected NoPutResultSet source

savedSource

NoPutResultSet savedSource

numIndexes

int numIndexes

rc

protected RowChanger rc

row

private ExecRow row

deferredBaseCC

protected ConglomerateController deferredBaseCC

rowHolder

protected TemporaryRowHolderImpl rowHolder

numOpens

private int numOpens

firstExecute

private boolean firstExecute

baseRowReadList

private FormatableBitSet baseRowReadList

rlColumnNumber

private int rlColumnNumber

fkInfoArray

protected FKInfo[] fkInfoArray

triggerInfo

private TriggerInfo triggerInfo

fkChecker

private RISetChecker fkChecker

triggerActivator

private TriggerEventActivator triggerActivator

noTriggersOrFks

private boolean noTriggersOrFks

deferredSparseRow

ExecRow deferredSparseRow

deferredBaseRow

ExecRow deferredBaseRow

lockMode

int lockMode

cascadeDelete

protected boolean cascadeDelete

deferredRLRow

ExecRow deferredRLRow

numberOfBaseColumns

int numberOfBaseColumns

Constructor Detail

DeleteResultSet

DeleteResultSet(NoPutResultSet source,
               Activation activation)
          throws StandardException

Throws:

StandardException

DeleteResultSet

DeleteResultSet(NoPutResultSet source,
               ConstantAction passedInConstantAction,
               Activation activation)
          throws StandardException

REMIND: At present this takes just the conglomerate id of the table. We can expect this to expand to include passing information about triggers, constraints, and any additional conglomerates on the underlying table for access methods.

Throws:

StandardException - Thrown on error

Method Detail

getResultDescription

public ResultDescription getResultDescription()

Returns the description of the deleted rows. REVISIT: Do we want this to return NULL instead?

Specified by:

getResultDescription in interface ResultSet

Overrides:

getResultDescription in class NoRowsResultSetImpl

Returns:

A ResultDescription describing the results of the statement.

open

public void open()
          throws StandardException

Description copied from interface: ResultSet

Needs to be called before the result set will do anything. Need to call before getNextRow(), or for a result set that doesn't return rows, this is the call that will cause all the work to be done.

Throws:

StandardException - Standard Derby error policy

setup

void setup()
     throws StandardException

Description copied from class: NoRowsResultSetImpl

Set up the result set for use. Should always be called from open().

Overrides:

setup in class NoRowsResultSetImpl

Throws:

StandardException - thrown on error

collectAffectedRows

boolean collectAffectedRows()
                      throws StandardException

Throws:

StandardException

fireBeforeTriggers

void fireBeforeTriggers()
                  throws StandardException

Throws:

StandardException

fireAfterTriggers

void fireAfterTriggers()
                 throws StandardException

Throws:

StandardException

deleteDeferredRows

void deleteDeferredRows()
                  throws StandardException

Throws:

StandardException

runFkChecker

void runFkChecker(boolean restrictCheckOnly)
            throws StandardException

Throws:

StandardException

createDependentSource

NoPutResultSet createDependentSource(RowChanger rc)
                               throws StandardException

create a source for the dependent table

Delete Cascade ResultSet class will override this method.

Throws:

StandardException - Thrown on error

cleanUp

public void cleanUp()
             throws StandardException

Description copied from interface: ResultSet

Tells the system to clean up on an error.

Throws:

StandardException - Thrown on error

See Also:

ResultSet.cleanUp()

finish

public void finish()
            throws StandardException

Description copied from interface: ResultSet

Tells the system that there will be no more access to any database information via this result set; in particular, no more calls to open(). Will close the result set if it is not already closed.

Specified by:

finish in interface ResultSet

Overrides:

finish in class NoRowsResultSetImpl

Throws:

StandardException - on error