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java.lang.Objectorg.apache.derby.impl.sql.execute.BasicNoPutResultSetImpl
org.apache.derby.impl.sql.execute.NoPutResultSetImpl
org.apache.derby.impl.sql.execute.ProjectRestrictResultSet
class ProjectRestrictResultSet
Takes a table and a table filter and returns the table's rows satisfying the filter as a result set.
Field Summary | |
---|---|
private boolean[] |
cloneMap
Holds columns present more than once in the result set and which may be represented by a stream, since such columns need to be cloned. |
GeneratedMethod |
constantRestriction
|
boolean |
doesProjection
|
private ExecRow |
mappedResultRow
|
private GeneratedMethod |
projection
|
long |
projectionTime
|
private int[] |
projectMapping
|
private ExecRow |
projRow
|
GeneratedMethod |
restriction
|
long |
restrictionTime
|
boolean |
reuseResult
|
private boolean |
runTimeStatsOn
|
private boolean |
shortCircuitOpen
|
(package private) NoPutResultSet |
source
|
Fields inherited from class org.apache.derby.impl.sql.execute.NoPutResultSetImpl |
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checkNullCols, clonedExecRow, cncLen, resultSetNumber, targetResultSet |
Fields inherited from class org.apache.derby.impl.sql.execute.BasicNoPutResultSetImpl |
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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 |
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CURRENT_RESULTSET_ONLY, ENTIRE_RESULTSET_TREE, ISAFTERLAST, ISBEFOREFIRST, ISFIRST, ISLAST |
Fields inherited from interface org.apache.derby.iapi.sql.execute.NoPutResultSet |
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ABSOLUTE, FIRST, LAST, NEXT, PREVIOUS, RELATIVE |
Constructor Summary | |
---|---|
ProjectRestrictResultSet(NoPutResultSet s,
Activation a,
GeneratedMethod r,
GeneratedMethod p,
int resultSetNumber,
GeneratedMethod cr,
int mapRefItem,
int cloneMapItem,
boolean reuseResult,
boolean doesProjection,
double optimizerEstimatedRowCount,
double optimizerEstimatedCost)
|
Method Summary | |
---|---|
void |
close()
If the result set has been opened, close the open scan. |
ExecRow |
doBaseRowProjection(ExecRow sourceRow)
Do the projection against the sourceRow. |
private ExecRow |
doProjection(ExecRow sourceRow)
Do the projection against the source row. |
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(). |
int[] |
getBaseProjectMapping()
Get projection mapping array. |
ExecRow |
getCurrentRow()
Gets last row returned. |
ExecRow |
getNextRowCore()
Return the requested values computed from the next row (if any) for which the restriction evaluates to true. |
RowLocation |
getRowLocation()
Gets information from its source. |
long |
getTimeSpent(int type)
Return the total amount of time spent in this ResultSet |
boolean |
isForUpdate()
Is this ResultSet or it's source result set for update |
void |
markRowAsDeleted()
Marks the resultSet's currentRow as deleted after a delete has been issued by either by using positioned delete or JDBC's deleteRow method. |
void |
openCore()
open a scan on the table. scan parameters are evaluated at each open, so there is probably some way of altering their values... |
void |
reopenCore()
reopen a scan on the table. scan parameters are evaluated at each open, so there is probably some way of altering their values... |
void |
updateRow(ExecRow row,
RowChanger rowChanger)
Updates the resultSet's current row with it's new values after an update has been issued either using positioned update or JDBC's udpateRow method. |
Methods inherited from class org.apache.derby.impl.sql.execute.NoPutResultSetImpl |
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clearCurrentRow, clearOrderableCache, closeRowSource, getCursorName, getNextRowFromRowSource, getResultDescription, getValidColumns, needsRowLocation, needsToClone, positionScanAtRowLocation, printQualifiers, resultSetNumber, rowLocation, setCurrentRow, setNeedsRowLocation, setTargetResultSet, skipRow, skipScan |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Methods inherited from interface org.apache.derby.iapi.sql.ResultSet |
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checkRowPosition, cleanUp, clearCurrentRow, getAbsoluteRow, getActivation, getAutoGeneratedKeysResultset, getBeginExecutionTimestamp, getCursorName, getEndExecutionTimestamp, getExecuteTime, getFirstRow, getLastRow, getNextRow, getPreviousRow, getRelativeRow, getResultDescription, getRowNumber, getSubqueryTrackingArray, getWarnings, isClosed, modifiedRowCount, open, returnsRows, setAfterLastRow, setBeforeFirstRow |
Field Detail |
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public long restrictionTime
public long projectionTime
final NoPutResultSet source
public GeneratedMethod constantRestriction
public GeneratedMethod restriction
public boolean doesProjection
private GeneratedMethod projection
private int[] projectMapping
private boolean[] cloneMap
private boolean runTimeStatsOn
private ExecRow mappedResultRow
public boolean reuseResult
private boolean shortCircuitOpen
private ExecRow projRow
Constructor Detail |
---|
ProjectRestrictResultSet(NoPutResultSet s, Activation a, GeneratedMethod r, GeneratedMethod p, int resultSetNumber, GeneratedMethod cr, int mapRefItem, int cloneMapItem, boolean reuseResult, boolean doesProjection, double optimizerEstimatedRowCount, double optimizerEstimatedCost) throws StandardException
StandardException
Method Detail |
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public void openCore() throws StandardException
openCore
in interface NoPutResultSet
StandardException
- thrown if cursor finished.public void reopenCore() throws StandardException
reopenCore
in interface NoPutResultSet
reopenCore
in class BasicNoPutResultSetImpl
StandardException
- thrown if cursor finished.NoPutResultSet.openCore()
public ExecRow getNextRowCore() throws StandardException
restriction and projection parameters are evaluated for each row.
getNextRowCore
in interface NoPutResultSet
getNextRowCore
in class BasicNoPutResultSetImpl
StandardException
- thrown on failure.
StandardException
- ResultSetNotOpen thrown if not yet open.NoPutResultSet.getNextRowCore()
public 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 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 RowLocation getRowLocation() throws StandardException
getRowLocation
in interface CursorResultSet
StandardException
- thrown on failure.CursorResultSet
public ExecRow getCurrentRow() throws StandardException
getCurrentRow
in interface CursorResultSet
StandardException
- thrown on failure.CursorResultSet
private ExecRow doProjection(ExecRow sourceRow) throws StandardException
sourceRow
- The source row.
StandardException
- thrown on failure.public ExecRow doBaseRowProjection(ExecRow sourceRow) throws StandardException
sourceRow
- row to be projected
StandardException
- thrown on failure.public int[] getBaseProjectMapping()
public boolean isForUpdate()
isForUpdate
in interface NoPutResultSet
isForUpdate
in class NoPutResultSetImpl
public void updateRow(ExecRow row, RowChanger rowChanger) throws StandardException
NoPutResultSet
updateRow
in interface NoPutResultSet
updateRow
in class NoPutResultSetImpl
row
- new values for the currentRowrowChanger
- holds information about row: what columns of it is to
be used for updating, and what underlying base table column each
such column corresponds to.
StandardException
- thrown on failure.NoPutResultSet.updateRow(org.apache.derby.iapi.sql.execute.ExecRow, org.apache.derby.iapi.sql.execute.RowChanger)
public void markRowAsDeleted() throws StandardException
NoPutResultSet
markRowAsDeleted
in interface NoPutResultSet
markRowAsDeleted
in class NoPutResultSetImpl
StandardException
- thrown on failure.NoPutResultSet.markRowAsDeleted()
|
Built on Thu 2012-03-29 21:53:33+0000, from revision ??? | ||||||||
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