java.lang.Object
- org.apache.derby.impl.sql.execute.BasicNoPutResultSetImpl
- - org.apache.derby.impl.sql.execute.NoPutResultSetImpl
  - - org.apache.derby.impl.sql.execute.RowResultSet

All Implemented Interfaces:

CursorResultSet, NoPutResultSet, ResultSet, RowLocationRetRowSource, RowSource
```
class RowResultSet
extends NoPutResultSetImpl
implements CursorResultSet
```
Takes a constant row value and returns it as a result set.
This class actually probably never underlies a select statement, but in case it might and because it has the same behavior as the ones that do, we have it implement CursorResultSet and give reasonable answers.

Nested Class Summary
- Nested classes/interfaces inherited from class org.apache.derby.impl.sql.execute.BasicNoPutResultSetImpl
  BasicNoPutResultSetImpl.FieldComparator

Field Summary

Fields
Modifier and Type Field Description

private ExecRow cachedRow

private boolean canCacheRow

private boolean next

private GeneratedMethod row

int rowsReturned
- Fields inherited from class org.apache.derby.impl.sql.execute.NoPutResultSetImpl
  checkNullCols, clonedExecRow, cncLen, resultSetNumber, targetResultSet
- Fields inherited from class org.apache.derby.impl.sql.execute.BasicNoPutResultSetImpl
  activation, beginTime, closeTime, compactRow, constructorTime, currentRow, endExecutionTime, finished, isOpen, isTopResultSet, nextTime, numOpens, openTime, optimizerEstimatedCost, optimizerEstimatedRowCount, resultDescription, rowsFiltered, rowsSeen, startExecutionTime, subqueryTrackingArray
- Fields inherited from interface org.apache.derby.iapi.sql.execute.NoPutResultSet
  ABSOLUTE, FIRST, LAST, NEXT, PREVIOUS, RELATIVE, TEMPORARY_RESULT_SET_NUMBER
- 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
`RowResultSet(Activation activation, GeneratedMethod row, boolean canCacheRow, int resultSetNumber, double optimizerEstimatedRowCount, double optimizerEstimatedCost)`
`RowResultSet(Activation activation, ExecRow constantRow, boolean canCacheRow, int resultSetNumber, double optimizerEstimatedRowCount, double optimizerEstimatedCost)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`close()`	Close needs to invalidate any dependent statements, if this is a cursor.
`ExecRow`	`getCurrentRow()`	This is not used in positioned update and delete, so just return a null.
`ExecRow`	`getNextRowCore()`	If open and not returned yet, returns the row after plugging the parameters into the expressions.
`RowLocation`	`getRowLocation()`	This is not operating against a stored table, so it has no row location to report.
`long`	`getTimeSpent(int type)`	Return the total amount of time spent in this ResultSet
`void`	`openCore()`	Sets state to 'open'.

Methods inherited from class org.apache.derby.impl.sql.execute.NoPutResultSetImpl
clearCurrentRow, clearOrderableCache, closeRowSource, getCursorName, getNextRowFromRowSource, getResultDescription, getValidColumns, isForUpdate, markRowAsDeleted, needsRowLocation, needsRowLocationForDeferredCheckConstraints, needsToClone, offendingRowLocation, positionScanAtRowLocation, printQualifiers, resultSetNumber, rowLocation, setCurrentRow, setHasDeferrableChecks, setNeedsRowLocation, setTargetResultSet, skipRow, skipScan, unpackHashValue, updateRow

Methods inherited from class org.apache.derby.impl.sql.execute.BasicNoPutResultSetImpl
addWarning, attachStatementContext, checkCancellationFlag, checkRowPosition, childrenToXML, cleanUp, dumpTimeStats, finish, finishAndRTS, getAbsoluteRow, getActivation, getAutoGeneratedKeysResultset, getBeginExecutionTimestamp, getCompactRow, getCurrentTimeMillis, getElapsedMillis, getEndExecutionTimestamp, getEstimatedRowCount, getExecuteTime, getExecutionFactory, getFirstRow, getLanguageConnectionContext, getLastRow, getNextRow, getPointOfAttachment, getPreviousRow, getRelativeRow, getRowNumber, getScanIsolationLevel, getSubqueryTrackingArray, getTransactionController, getWarnings, isClosed, isXplainOnlyMode, markAsTopResultSet, modifiedRowCount, open, recordConstructorTime, reopenCore, requiresRelocking, returnsRows, setAfterLastRow, setBeforeFirstRow, setCompactRow, setCompatRow, toXML, toXML

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.derby.iapi.sql.ResultSet
addWarning, checkRowPosition, cleanUp, clearCurrentRow, finish, getAbsoluteRow, getActivation, getAutoGeneratedKeysResultset, getBeginExecutionTimestamp, getCursorName, getEndExecutionTimestamp, getExecuteTime, getFirstRow, getLastRow, getNextRow, getPreviousRow, getRelativeRow, getResultDescription, getRowNumber, getSubqueryTrackingArray, getWarnings, isClosed, modifiedRowCount, open, returnsRows, setAfterLastRow, setBeforeFirstRow, toXML

- Field Detail
  - rowsReturned
```
public int rowsReturned
```
  - canCacheRow
```
private boolean canCacheRow
```
  - next
```
private boolean next
```
  - row
```
private GeneratedMethod row
```
  - cachedRow
```
private ExecRow cachedRow
```
- Constructor Detail
  - RowResultSet
```
RowResultSet(Activation activation,
             GeneratedMethod row,
             boolean canCacheRow,
             int resultSetNumber,
             double optimizerEstimatedRowCount,
             double optimizerEstimatedCost)
```
  - RowResultSet
```
RowResultSet(Activation activation,
             ExecRow constantRow,
             boolean canCacheRow,
             int resultSetNumber,
             double optimizerEstimatedRowCount,
             double optimizerEstimatedCost)
```
- Method Detail
  - openCore
```
public void openCore()
              throws StandardException
```
    Sets state to 'open'.
    
    Specified by:
    
    openCore in interface NoPutResultSet
    
    Throws:
    
    StandardException - thrown if activation closed.
  - getNextRowCore
```
public ExecRow getNextRowCore()
                       throws StandardException
```
    If open and not returned yet, returns the row after plugging the parameters into the expressions.
    
    Specified by:
    
    getNextRowCore in interface NoPutResultSet
    
    Specified by:
    
    getNextRowCore in class BasicNoPutResultSetImpl
    
    Returns:
    
    the next row in the result
    
    Throws:
    
    StandardException - thrown on failure.
    
    See Also:
    
    NoPutResultSet.getNextRowCore()
  - close
```
public void close()
           throws StandardException
```
    Description copied from class: NoPutResultSetImpl
    
    Close needs to invalidate any dependent statements, if this is a cursor. Must be called by any subclasses that override close().
    
    Specified by:
    
    close in interface ResultSet
    
    Overrides:
    
    close in class NoPutResultSetImpl
    
    Throws:
    
    StandardException - thrown on error
    
    See Also:
    
    ResultSet.close()
  - getTimeSpent
```
public long getTimeSpent(int type)
```
    Return the total amount of time spent in this ResultSet
    
    Specified by:
    
    getTimeSpent in interface ResultSet
    
    Parameters:
    
    type - CURRENT_RESULTSET_ONLY - time spent only in this ResultSet ENTIRE_RESULTSET_TREE - time spent in this ResultSet and below.
    
    Returns:
    
    long The total amount of time spent (in milliseconds).
  - getRowLocation
```
public RowLocation getRowLocation()
```
    This is not operating against a stored table, so it has no row location to report.
    
    Specified by:
    
    getRowLocation in interface CursorResultSet
    
    Returns:
    
    a null.
    
    See Also:
    
    CursorResultSet
  - getCurrentRow
```
public ExecRow getCurrentRow()
```
    This is not used in positioned update and delete, so just return a null.
    
    Specified by:
    
    getCurrentRow in interface CursorResultSet
    
    Returns:
    
    a null.
    
    See Also:
    
    CursorResultSet

Modifier and Type	Field	Description
`private ExecRow`	`cachedRow`
`private boolean`	`canCacheRow`
`private boolean`	`next`
`private GeneratedMethod`	`row`
`int`	`rowsReturned`

Class RowResultSet

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.derby.impl.sql.execute.BasicNoPutResultSetImpl

Field Summary

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

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

Fields inherited from interface org.apache.derby.iapi.sql.execute.NoPutResultSet

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

Constructor Summary

Method Summary

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

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

Methods inherited from class java.lang.Object

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

Field Detail

rowsReturned

canCacheRow

next

row

cachedRow

Constructor Detail

RowResultSet

RowResultSet

Method Detail

openCore

getNextRowCore

close

getTimeSpent

getRowLocation

getCurrentRow