|
|||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
java.lang.Objectorg.apache.derby.impl.sql.execute.BasicNoPutResultSetImpl
org.apache.derby.impl.sql.execute.NoPutResultSetImpl
org.apache.derby.impl.sql.execute.UnionResultSet
class UnionResultSet
Takes two result sets and returns their union (all). (Any duplicate elimination is performed above this ResultSet.)
Field Summary | |
---|---|
int |
rowsReturned
|
int |
rowsSeenLeft
|
int |
rowsSeenRight
|
NoPutResultSet |
source1
|
private int |
source1FinalRowCount
|
NoPutResultSet |
source2
|
private int |
whichSource
|
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.ResultSet |
---|
CURRENT_RESULTSET_ONLY, ENTIRE_RESULTSET_TREE, ISAFTERLAST, ISBEFOREFIRST, ISFIRST, ISLAST |
Fields inherited from interface org.apache.derby.iapi.sql.execute.NoPutResultSet |
---|
ABSOLUTE, FIRST, LAST, NEXT, PREVIOUS, RELATIVE |
Constructor Summary | |
---|---|
UnionResultSet(NoPutResultSet source1,
NoPutResultSet source2,
Activation activation,
int resultSetNumber,
double optimizerEstimatedRowCount,
double optimizerEstimatedCost)
|
Method Summary | |
---|---|
void |
close()
If the result set has been opened, close the currently open source. |
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(). |
ExecRow |
getCurrentRow()
A union has a single underlying row at a time, although from one of several sources. |
ExecRow |
getNextRowCore()
If there are rows still on the first source, return the next one; otherwise, switch to the second source and return a row from there. |
ResultDescription |
getResultDescription()
Returns the description of the first source. |
RowLocation |
getRowLocation()
A union has a single underlying row at a time, although from one of several sources. |
long |
getTimeSpent(int type)
Return the total amount of time spent in this ResultSet |
void |
openCore()
open the first source. |
Methods inherited from class org.apache.derby.impl.sql.execute.NoPutResultSetImpl |
---|
clearCurrentRow, clearOrderableCache, closeRowSource, getCursorName, getNextRowFromRowSource, getValidColumns, isForUpdate, markRowAsDeleted, needsRowLocation, needsToClone, positionScanAtRowLocation, printQualifiers, resultSetNumber, rowLocation, setCurrentRow, setNeedsRowLocation, setTargetResultSet, skipRow, skipScan, updateRow |
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 |
---|
checkRowPosition, cleanUp, clearCurrentRow, getAbsoluteRow, getActivation, getAutoGeneratedKeysResultset, getBeginExecutionTimestamp, getCursorName, getEndExecutionTimestamp, getExecuteTime, getFirstRow, getLastRow, getNextRow, getPreviousRow, getRelativeRow, getRowNumber, getSubqueryTrackingArray, getWarnings, isClosed, modifiedRowCount, open, returnsRows, setAfterLastRow, setBeforeFirstRow |
Field Detail |
---|
public int rowsSeenLeft
public int rowsSeenRight
public int rowsReturned
private int whichSource
private int source1FinalRowCount
public NoPutResultSet source1
public NoPutResultSet source2
Constructor Detail |
---|
public UnionResultSet(NoPutResultSet source1, NoPutResultSet source2, Activation activation, int resultSetNumber, double optimizerEstimatedRowCount, double optimizerEstimatedCost)
Method Detail |
---|
public ResultDescription getResultDescription()
getResultDescription
in interface ResultSet
getResultDescription
in class NoPutResultSetImpl
public void openCore() throws StandardException
openCore
in interface NoPutResultSet
StandardException
- thrown on failurepublic ExecRow getNextRowCore() throws StandardException
getNextRowCore
in interface NoPutResultSet
getNextRowCore
in class BasicNoPutResultSetImpl
StandardException
- thrown on failureNoPutResultSet.getNextRowCore()
public void close() throws StandardException
close
in interface ResultSet
close
in class NoPutResultSetImpl
StandardException
- thrown on errorpublic void finish() throws StandardException
ResultSet
finish
in interface ResultSet
finish
in class BasicNoPutResultSetImpl
StandardException
- on errorpublic long getTimeSpent(int type)
getTimeSpent
in interface ResultSet
type
- CURRENT_RESULTSET_ONLY - time spent only in this ResultSet
ENTIRE_RESULTSET_TREE - time spent in this ResultSet and below.
public RowLocation getRowLocation() throws StandardException
getRowLocation
in interface CursorResultSet
StandardException
- thrown on failureCursorResultSet
public ExecRow getCurrentRow() throws StandardException
getCurrentRow
in interface CursorResultSet
StandardException
- thrown on failure.CursorResultSet
|
Built on Thu 2012-03-29 21:53:33+0000, from revision ??? | ||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |