Package org.apache.derby.impl.sql.execute.rts

Class RealDistinctScanStatistics

java.lang.Object

org.apache.derby.impl.sql.execute.rts.RealBasicNoPutResultSetStatistics

org.apache.derby.impl.sql.execute.rts.RealNoPutResultSetStatistics

org.apache.derby.impl.sql.execute.rts.RealHashScanStatistics

org.apache.derby.impl.sql.execute.rts.RealDistinctScanStatistics

All Implemented Interfaces:

ResultSetStatistics, XPLAINable

public class RealDistinctScanStatistics
extends RealHashScanStatistics

ResultSetStatistics implemenation for DistinctScanResultSet.

Field Summary

Fields inherited from class org.apache.derby.impl.sql.execute.rts.RealHashScanStatistics

hashKeyColumns, hashtableSize, indexName, isConstraint, isolationLevel, lockString, nextQualifiers, scanProperties, scanQualifiers, startPosition, stopPosition, tableName

Fields inherited from class org.apache.derby.impl.sql.execute.rts.RealNoPutResultSetStatistics

indent, resultSetNumber, sourceDepth, subIndent

Fields inherited from class org.apache.derby.impl.sql.execute.rts.RealBasicNoPutResultSetStatistics

closeTime, constructorTime, inspectDesc, inspectNum, inspectOverall, nextTime, numOpens, openTime, optimizerEstimatedCost, optimizerEstimatedRowCount, rowsFiltered, rowsSeen

Constructor Summary

Constructors

Constructor

Description

RealDistinctScanStatistics(int numOpens, int rowsSeen, int rowsFiltered, long constructorTime, long openTime, long nextTime, long closeTime, int resultSetNumber, String tableName, String indexName, boolean isConstraint, int hashtableSize, int[] hashKeyColumns, String scanQualifiers, String nextQualifiers, Properties scanProperties, String startPosition, String stopPosition, String isolationLevel, String lockString, double optimizerEstimatedRowCount, double optimizerEstimatedCost)

Method Summary

Modifier and Type	Method	Description
void	accept(XPLAINVisitor visitor)	This method gets called to let a visitor visit this XPLAINable object.
String	getNodeName()	Format for display, a name for this node.
String	getNodeOn()	If this node is on a database item (like a table or an index), then provide a string that describes the on item.
String	getRSXplainType()
String	getScanStatisticsText(String tableName, int depth)	Return information on the scan nodes from the statement execution plan as a String.
String	getStatementExecutionPlanText(int depth)	Return the statement execution plan as a String.
String	toString()

Methods inherited from class org.apache.derby.impl.sql.execute.rts.RealHashScanStatistics

getResultSetDescriptor, getRSXplainDetails, getScanPropsDescriptor

Methods inherited from class org.apache.derby.impl.sql.execute.rts.RealNoPutResultSetStatistics

initFormatInfo

Methods inherited from class org.apache.derby.impl.sql.execute.rts.RealBasicNoPutResultSetStatistics

dumpEstimatedCosts, dumpTimeStats, getChildren, getChildrenTime, getEstimatedRowCount, getNodeTime, getResultSetTimingsDescriptor, getSortPropsDescriptor, getTotalTime

Methods inherited from class java.lang.Object

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

Constructor Details

RealDistinctScanStatistics

public RealDistinctScanStatistics(int numOpens,
 int rowsSeen,
 int rowsFiltered,
 long constructorTime,
 long openTime,
 long nextTime,
 long closeTime,
 int resultSetNumber,
 String tableName,
 String indexName,
 boolean isConstraint,
 int hashtableSize,
 int[] hashKeyColumns,
 String scanQualifiers,
 String nextQualifiers,
 Properties scanProperties,
 String startPosition,
 String stopPosition,
 String isolationLevel,
 String lockString,
 double optimizerEstimatedRowCount,
 double optimizerEstimatedCost)

Method Details

getStatementExecutionPlanText

public String getStatementExecutionPlanText(int depth)

Return the statement execution plan as a String.

Specified by:

getStatementExecutionPlanText in interface ResultSetStatistics

Overrides:

getStatementExecutionPlanText in class RealHashScanStatistics

Parameters:

depth - Indentation level.

Returns:

String The statement executio plan as a String.

getScanStatisticsText

public String getScanStatisticsText(String tableName,
 int depth)

Return information on the scan nodes from the statement execution plan as a String.

Specified by:

getScanStatisticsText in interface ResultSetStatistics

Overrides:

getScanStatisticsText in class RealHashScanStatistics

Parameters:

tableName - if not NULL then print information for this table only

depth - Indentation level.

Returns:

String The information on the scan nodes from the statement execution plan as a String.

toString

public String toString()

Overrides:

toString in class RealHashScanStatistics

getNodeOn

public String getNodeOn()

If this node is on a database item (like a table or an index), then provide a string that describes the on item.

Overrides:

getNodeOn in class RealHashScanStatistics

getNodeName

public String getNodeName()

Format for display, a name for this node.

Overrides:

getNodeName in class RealHashScanStatistics

accept

public void accept(XPLAINVisitor visitor)

Description copied from interface: XPLAINable

This method gets called to let a visitor visit this XPLAINable object. The general contract is to implement pre-order, depth-first traversal to produce a predictable traversal behaviour.

Specified by:

accept in interface XPLAINable

Overrides:

accept in class RealHashScanStatistics

getRSXplainType

public String getRSXplainType()

Specified by:

getRSXplainType in interface XPLAINable

Overrides:

getRSXplainType in class RealHashScanStatistics