Top Description Fields Constructors Methods
org.apache.derby.impl.sql.execute.rts

public Class RealHashTableStatistics

extends RealNoPutResultSetStatistics
Class Inheritance
Imports
org.apache.derby.iapi.sql.execute.ResultSetStatistics, org.apache.derby.shared.common.util.ArrayUtil, org.apache.derby.iapi.services.io.StoredFormatIds, .FormatableHashtable, .FormatableProperties, org.apache.derby.shared.common.i18n.MessageService, org.apache.derby.shared.common.reference.SQLState, org.apache.derby.catalog.UUID, org.apache.derby.impl.sql.catalog.XPLAINScanPropsDescriptor, org.apache.derby.impl.sql.execute.xplain.XPLAINUtil, org.apache.derby.iapi.sql.execute.xplain.XPLAINVisitor, java.io.ObjectOutput, .ObjectInput, .IOException, java.util.Enumeration, .Properties
ResultSetStatistics implemenation for HashTableResultSet.

Field Summary

Modifier and TypeField and Description
public ResultSetStatistics
childResultSetStatistics

public int[]
hashKeyColumns

public int
hashtableSize

public String
isolationLevel

public String
nextQualifiers

public FormatableProperties
scanProperties

public ResultSetStatistics[]
subqueryTrackingArray

Inherited from org.apache.derby.impl.sql.execute.rts.RealNoPutResultSetStatistics:
indentresultSetNumbersourceDepthsubIndent

Constructor Summary

AccessConstructor and Description
public
RealHashTableStatistics(int numOpens, int rowsSeen, int rowsFiltered, long constructorTime, long openTime, long nextTime, long closeTime, int resultSetNumber, int hashtableSize, int[] hashKeyColumns, String nextQualifiers, Properties scanProperties, double optimizerEstimatedRowCount, double optimizerEstimatedCost, ResultSetStatistics[] subqueryTrackingArray, ResultSetStatistics childResultSetStatistics)

Method Summary

Modifier and TypeMethod and Description
public void
accept(XPLAINVisitor visitor)

Implements org.apache.derby.iapi.sql.execute.xplain.XPLAINable.accept.

This method gets called to let a visitor visit this XPLAINable object.

public String
getNodeName()

Implements abstract org.apache.derby.impl.sql.execute.rts.RealBasicNoPutResultSetStatistics.getNodeName.

Format for display, a name for this node.

public String
getNodeOn()

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

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

public String
getRSXplainDetails()

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

Implements org.apache.derby.iapi.sql.execute.xplain.XPLAINable.getRSXplainDetails.

public String
getRSXplainType()

Implements org.apache.derby.iapi.sql.execute.xplain.XPLAINable.getRSXplainType.

public Object
getScanPropsDescriptor(Object scanPropsID)

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

Implements org.apache.derby.iapi.sql.execute.xplain.XPLAINable.getScanPropsDescriptor.

public String

Returns:

String The information on the scan nodes from the statement execution plan as a String.
getScanStatisticsText(String
if not NULL then print information for this table only
tableName, int
Indentation level.
depth)

Implements org.apache.derby.iapi.sql.execute.ResultSetStatistics.getScanStatisticsText.

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

public String

Returns:

String The statement executio plan as a String.
getStatementExecutionPlanText(int
Indentation level.
depth)

Implements org.apache.derby.iapi.sql.execute.ResultSetStatistics.getStatementExecutionPlanText.

Return the statement execution plan as a String.

public String
toString()

Overrides java.lang.Object.toString.

Returns a string representation of the object.

Inherited from org.apache.derby.impl.sql.execute.rts.RealNoPutResultSetStatistics:
initFormatInfo

Field Detail

childResultSetStatisticsback to summary
public ResultSetStatistics childResultSetStatistics
hashKeyColumnsback to summary
public int[] hashKeyColumns
hashtableSizeback to summary
public int hashtableSize
isolationLevelback to summary
public String isolationLevel
nextQualifiersback to summary
public String nextQualifiers
scanPropertiesback to summary
public FormatableProperties scanProperties
subqueryTrackingArrayback to summary
public ResultSetStatistics[] subqueryTrackingArray

Constructor Detail

RealHashTableStatisticsback to summary
public RealHashTableStatistics(int numOpens, int rowsSeen, int rowsFiltered, long constructorTime, long openTime, long nextTime, long closeTime, int resultSetNumber, int hashtableSize, int[] hashKeyColumns, String nextQualifiers, Properties scanProperties, double optimizerEstimatedRowCount, double optimizerEstimatedCost, ResultSetStatistics[] subqueryTrackingArray, ResultSetStatistics childResultSetStatistics)

Method Detail

acceptback to summary
public void accept(XPLAINVisitor visitor)

Implements org.apache.derby.iapi.sql.execute.xplain.XPLAINable.accept.

Doc from org.apache.derby.iapi.sql.execute.xplain.XPLAINable.accept.

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.

getNodeNameback to summary
public String getNodeName()

Implements abstract org.apache.derby.impl.sql.execute.rts.RealBasicNoPutResultSetStatistics.getNodeName.

Format for display, a name for this node.

getNodeOnback to summary
public String getNodeOn()

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

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

getRSXplainDetailsback to summary
public String getRSXplainDetails()

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

Implements org.apache.derby.iapi.sql.execute.xplain.XPLAINable.getRSXplainDetails.

getRSXplainTypeback to summary
public String getRSXplainType()

Implements org.apache.derby.iapi.sql.execute.xplain.XPLAINable.getRSXplainType.

getScanPropsDescriptorback to summary
public Object getScanPropsDescriptor(Object scanPropsID)

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

Implements org.apache.derby.iapi.sql.execute.xplain.XPLAINable.getScanPropsDescriptor.

getScanStatisticsTextback to summary
public String getScanStatisticsText(String tableName, int depth)

Implements org.apache.derby.iapi.sql.execute.ResultSetStatistics.getScanStatisticsText.

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

Parameters
tableName:String

if not NULL then print information for this table only

depth:int

Indentation level.

Returns:String

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

getStatementExecutionPlanTextback to summary
public String getStatementExecutionPlanText(int depth)

Implements org.apache.derby.iapi.sql.execute.ResultSetStatistics.getStatementExecutionPlanText.

Return the statement execution plan as a String.

Parameters
depth:int

Indentation level.

Returns:String

String The statement executio plan as a String.

toStringback to summary
public String toString()

Overrides java.lang.Object.toString.

Doc from java.lang.Object.toString.

Returns a string representation of the object. Satisfying this method's contract implies a non-null result must be returned.

Returns:String

a string representation of the object