org.apache.derby.impl.sql
Class GenericPreparedStatement.RowCountStatistics

java.lang.Object
  org.apache.derby.impl.sql.GenericPreparedStatement.RowCountStatistics

Enclosing class:

GenericPreparedStatement

private static class GenericPreparedStatement.RowCountStatistics
extends java.lang.Object

This class holds information about stale plan check interval, execution count and row count statistics for a GenericPreparedStatement. The fields and methods should ideally live in GenericPreparedStatement, not in a separate class. However, triggers clone the GPS on each execution, which means the statistics would be reset on each execution if they lived directly inside GPS. Instead, keep the statistics in an object that can be shared between multiple GPS instances when they are cloned.

Field Summary

private int	executionCount
private java.util.ArrayList	rowCounts
private int	stalePlanCheckInterval

Constructor Summary

private

GenericPreparedStatement.RowCountStatistics()

Method Summary

(package private) long	getInitialRowCount(int rsNum, long rowCount)
(package private) int	getStalePlanCheckInterval()
(package private) int	incrementExecutionCount()
(package private) void	reset() Reset all the row count statistics.
(package private) void	setStalePlanCheckInterval(int interval)

Methods inherited from class java.lang.Object

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

Field Detail

stalePlanCheckInterval

private int stalePlanCheckInterval

executionCount

private int executionCount

rowCounts

private java.util.ArrayList rowCounts

Constructor Detail

GenericPreparedStatement.RowCountStatistics

private GenericPreparedStatement.RowCountStatistics()

Method Detail

incrementExecutionCount

int incrementExecutionCount()

See Also:

ExecPreparedStatement.incrementExecutionCount()

getInitialRowCount

long getInitialRowCount(int rsNum,
                        long rowCount)

See Also:

ExecPreparedStatement.getInitialRowCount(int, long)

setStalePlanCheckInterval

void setStalePlanCheckInterval(int interval)

See Also:

ExecPreparedStatement.setStalePlanCheckInterval(int)

getStalePlanCheckInterval

int getStalePlanCheckInterval()

See Also:

ExecPreparedStatement.getStalePlanCheckInterval()

reset

void reset()

Reset all the row count statistics.