DeleteResultSet (Apache Derby V10.14 Internals)

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	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`
`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, cachedDestinations, constantAction, heapDCOCI, indexDCOCIs, resultDescription, 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	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

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`cleanUp()`	Tells the system to clean up on an error.
`void`	`close()`	Tells the system that there will be no more calls to getNextRow() (until the next open() call), so it can free up the resources associated with the ResultSet.
`(package private) boolean`	`collectAffectedRows()`
`(package private) NoPutResultSet`	`createDependentSource(RowChanger rc)`	create a source for the dependent table
`(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()`
`void`	`open()`	Needs to be called before the result set will do anything.
`(package private) void`	`runFkChecker(boolean restrictCheckOnly)`	Make sure foreign key constraints are not violated
`(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, getResultDescription, makeDeferredSparseRow, modifiedRowCount, normalizeRow, rememberConstraint

Methods inherited from class org.apache.derby.impl.sql.execute.NoRowsResultSetImpl
addWarning, checkRowPosition, clearCurrentRow, close, doesCommit, evaluateGenerationClauses, getAbsoluteRow, getActivation, getAutoGeneratedKeysResultset, getBeginExecutionTimestamp, getCurrentTimeMillis, getCursorName, getEndExecutionTimestamp, getExecuteTime, getFirstRow, getLastRow, getNextRow, getPreviousRow, getQueryPlanText, getRelativeRow, getRowNumber, getSubqueryTrackingArray, getTimeSpent, getWarnings, isClosed, returnsRows, setAfterLastRow, setBeforeFirstRow, toXML

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
```
  - 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
  - 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
```
    Make sure foreign key constraints are not violated
    
    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()
  - close
```
public void close()
           throws StandardException
```
    Description copied from interface: ResultSet
    
    Tells the system that there will be no more calls to getNextRow() (until the next open() call), so it can free up the resources associated with the ResultSet.
    
    Throws:
    
    StandardException - Thrown on error.
  - 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

Class DeleteResultSet

Field Summary

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

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

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

Constructor Summary

Method Summary

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

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

Methods inherited from class java.lang.Object

Field Detail

tc

constants

source

savedSource

numIndexes

rc

row

deferredBaseCC

rowHolder

numOpens

firstExecute

baseRowReadList

rlColumnNumber

fkInfoArray

triggerInfo

fkChecker

triggerActivator

noTriggersOrFks

deferredSparseRow

deferredBaseRow

lockMode

cascadeDelete

deferredRLRow

numberOfBaseColumns

Constructor Detail

DeleteResultSet

DeleteResultSet

Method Detail

open

setup

collectAffectedRows

fireBeforeTriggers

fireAfterTriggers

deleteDeferredRows

runFkChecker

createDependentSource

cleanUp

close

finish