org.apache.derby.impl.sql.execute

Class RealResultSetStatisticsFactory

java.lang.Object

org.apache.derby.impl.sql.execute.RealResultSetStatisticsFactory

All Implemented Interfaces:

ResultSetStatisticsFactory

public class RealResultSetStatisticsFactory
extends java.lang.Object
implements ResultSetStatisticsFactory

ResultSetStatisticsFactory provides a wrapper around all of objects associated with run time statistics.

This implementation of the protocol is for returning the "real" run time statistics. We have modularized this so that we could have an implementation that just returns null for each of the objects should we decided to provide a configuration without the run time statistics feature.

Field Summary

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

MODULE

Constructor Summary

Constructors

Constructor and Description
RealResultSetStatisticsFactory()

Method Summary

Modifier and Type	Method and Description
ResultSetStatistics	getNoRowsResultSetStatistics(ResultSet rs)
ResultSetStatistics	getResultSetStatistics(NoPutResultSet rs)
ResultSetStatistics	getResultSetStatistics(ResultSet rs) Get the matching ResultSetStatistics for the specified ResultSet.
RunTimeStatistics	getRunTimeStatistics(Activation activation, ResultSet rs, NoPutResultSet[] subqueryTrackingArray) RunTimeStatistics creation.

Methods inherited from class java.lang.Object

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

Constructor Detail

RealResultSetStatisticsFactory

public RealResultSetStatisticsFactory()

Method Detail

getRunTimeStatistics

public RunTimeStatistics getRunTimeStatistics(Activation activation,
                                              ResultSet rs,
                                              NoPutResultSet[] subqueryTrackingArray)
                                       throws StandardException

Description copied from interface: ResultSetStatisticsFactory

RunTimeStatistics creation.

Specified by:

getRunTimeStatistics in interface ResultSetStatisticsFactory

Parameters:

activation - The Activation we are generating the statistics for

rs - The top ResultSet for the ResultSet tree

subqueryTrackingArray - Array of subqueries, used for finding materialized subqueries.

Throws:

StandardException - on error

See Also:

ResultSetStatisticsFactory.getRunTimeStatistics(org.apache.derby.iapi.sql.Activation, org.apache.derby.iapi.sql.ResultSet, org.apache.derby.iapi.sql.execute.NoPutResultSet[])

getResultSetStatistics

public ResultSetStatistics getResultSetStatistics(ResultSet rs)

Description copied from interface: ResultSetStatisticsFactory

Get the matching ResultSetStatistics for the specified ResultSet.

Specified by:

getResultSetStatistics in interface ResultSetStatisticsFactory

See Also:

ResultSetStatisticsFactory.getResultSetStatistics(org.apache.derby.iapi.sql.ResultSet)

getNoRowsResultSetStatistics

public ResultSetStatistics getNoRowsResultSetStatistics(ResultSet rs)

Specified by:

getNoRowsResultSetStatistics in interface ResultSetStatisticsFactory

getResultSetStatistics

public ResultSetStatistics getResultSetStatistics(NoPutResultSet rs)

Specified by:

getResultSetStatistics in interface ResultSetStatisticsFactory