CostEstimateImpl

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org.apache.derby.impl.sql.compile
Class CostEstimateImpl

java.lang.Object
  org.apache.derby.impl.sql.compile.CostEstimateImpl

All Implemented Interfaces:: org.apache.derby.iapi.sql.compile.CostEstimate, org.apache.derby.iapi.store.access.StoreCostResult

Direct Known Subclasses:: Level2CostEstimateImpl

public class CostEstimateImpl
extends java.lang.Object
implements org.apache.derby.iapi.sql.compile.CostEstimate

Field Summary

double cost


double rowCount


double singleScanRowCount


Constructor Summary

CostEstimateImpl()


CostEstimateImpl(double theCost, double theRowCount, double theSingleScanRowCount)


Method Summary

org.apache.derby.iapi.sql.compile.CostEstimate add(org.apache.derby.iapi.sql.compile.CostEstimate other, org.apache.derby.iapi.sql.compile.CostEstimate retval)
          Add this cost estimate to another one.

org.apache.derby.iapi.sql.compile.CostEstimate cloneMe()
          Get a copy of this CostEstimate

double compare(org.apache.derby.iapi.sql.compile.CostEstimate other)
          Compare this cost estimate with the given cost estimate.

org.apache.derby.iapi.sql.compile.CostEstimate divide(double divisor, org.apache.derby.iapi.sql.compile.CostEstimate retval)
          Divide this cost estimate by a scalar, non-dimensional number.

double getEstimatedCost()
          Get the estimated cost.

long getEstimatedRowCount()
          Get the estimated row count.

boolean isUninitialized()
          Return whether or not this CostEstimate is uninitialized.

org.apache.derby.iapi.sql.compile.CostEstimate multiply(double multiplicand, org.apache.derby.iapi.sql.compile.CostEstimate retval)
          Multiply this cost estimate by a scalar, non-dimensional number.

double rowCount()
          Get the estimated number of rows returned by the ResultSet that this CostEstimate models.

void setCost(org.apache.derby.iapi.sql.compile.CostEstimate other)
          Copy the values from the given cost estimate into this one.

void setCost(double cost, double rowCount, double singleScanRowCount)
          Set the cost for this cost estimate.

void setEstimatedCost(double cost)
          Set the estimated cost.

void setEstimatedRowCount(long count)
          Set the estimated row count.

void setSingleScanRowCount(double singleScanRowCount)
          Set the single scan row count.

CostEstimateImpl setState(double theCost, double theRowCount, CostEstimateImpl retval)


double singleScanRowCount()
          Get the estimated number of rows returned by a single scan of the ResultSet that this CostEstimate models.

Methods inherited from class java.lang.Object

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

Field Detail

cost

public double cost

rowCount

public double rowCount

singleScanRowCount

public double singleScanRowCount

Constructor Detail

CostEstimateImpl

public CostEstimateImpl()

CostEstimateImpl

public CostEstimateImpl(double theCost,
                        double theRowCount,
                        double theSingleScanRowCount)

Method Detail

setCost

public void setCost(double cost,
                    double rowCount,
                    double singleScanRowCount)

Description copied from interface: org.apache.derby.iapi.sql.compile.CostEstimate

Set the cost for this cost estimate.

Specified by:: setCost in interface org.apache.derby.iapi.sql.compile.CostEstimate

setCost

public void setCost(org.apache.derby.iapi.sql.compile.CostEstimate other)

Description copied from interface: org.apache.derby.iapi.sql.compile.CostEstimate

Copy the values from the given cost estimate into this one.

Specified by:: setCost in interface org.apache.derby.iapi.sql.compile.CostEstimate

setSingleScanRowCount

public void setSingleScanRowCount(double singleScanRowCount)

Description copied from interface: org.apache.derby.iapi.sql.compile.CostEstimate

Set the single scan row count.

Specified by:: setSingleScanRowCount in interface org.apache.derby.iapi.sql.compile.CostEstimate

compare

public double compare(org.apache.derby.iapi.sql.compile.CostEstimate other)

Description copied from interface: org.apache.derby.iapi.sql.compile.CostEstimate

Compare this cost estimate with the given cost estimate.

Specified by:: compare in interface org.apache.derby.iapi.sql.compile.CostEstimate

add

public org.apache.derby.iapi.sql.compile.CostEstimate add(org.apache.derby.iapi.sql.compile.CostEstimate other,
                                                          org.apache.derby.iapi.sql.compile.CostEstimate retval)

Description copied from interface: org.apache.derby.iapi.sql.compile.CostEstimate

Add this cost estimate to another one. This presumes that any row ordering is destroyed.

Specified by:: add in interface org.apache.derby.iapi.sql.compile.CostEstimate

multiply

public org.apache.derby.iapi.sql.compile.CostEstimate multiply(double multiplicand,
                                                               org.apache.derby.iapi.sql.compile.CostEstimate retval)

Description copied from interface: org.apache.derby.iapi.sql.compile.CostEstimate

Multiply this cost estimate by a scalar, non-dimensional number. This presumes that any row ordering is destroyed.

Specified by:: multiply in interface org.apache.derby.iapi.sql.compile.CostEstimate

divide

public org.apache.derby.iapi.sql.compile.CostEstimate divide(double divisor,
                                                             org.apache.derby.iapi.sql.compile.CostEstimate retval)

Description copied from interface: org.apache.derby.iapi.sql.compile.CostEstimate

Divide this cost estimate by a scalar, non-dimensional number.

Specified by:: divide in interface org.apache.derby.iapi.sql.compile.CostEstimate

rowCount

public double rowCount()

Description copied from interface: org.apache.derby.iapi.sql.compile.CostEstimate

Get the estimated number of rows returned by the ResultSet that this CostEstimate models.

Specified by:: rowCount in interface org.apache.derby.iapi.sql.compile.CostEstimate

singleScanRowCount

public double singleScanRowCount()

Description copied from interface: org.apache.derby.iapi.sql.compile.CostEstimate

Get the estimated number of rows returned by a single scan of the ResultSet that this CostEstimate models.

Specified by:: singleScanRowCount in interface org.apache.derby.iapi.sql.compile.CostEstimate

cloneMe

public org.apache.derby.iapi.sql.compile.CostEstimate cloneMe()

Description copied from interface: org.apache.derby.iapi.sql.compile.CostEstimate

Get a copy of this CostEstimate

Specified by:: cloneMe in interface org.apache.derby.iapi.sql.compile.CostEstimate

isUninitialized

public boolean isUninitialized()

Description copied from interface: org.apache.derby.iapi.sql.compile.CostEstimate

Return whether or not this CostEstimate is uninitialized.

Specified by:: isUninitialized in interface org.apache.derby.iapi.sql.compile.CostEstimate

getEstimatedCost

public double getEstimatedCost()

Description copied from interface: org.apache.derby.iapi.store.access.StoreCostResult

Get the estimated cost.

Specified by:: getEstimatedCost in interface org.apache.derby.iapi.store.access.StoreCostResult

setEstimatedCost

public void setEstimatedCost(double cost)

Description copied from interface: org.apache.derby.iapi.store.access.StoreCostResult

Set the estimated cost.

Specified by:: setEstimatedCost in interface org.apache.derby.iapi.store.access.StoreCostResult

getEstimatedRowCount

public long getEstimatedRowCount()

Description copied from interface: org.apache.derby.iapi.store.access.StoreCostResult

Get the estimated row count.

Specified by:: getEstimatedRowCount in interface org.apache.derby.iapi.store.access.StoreCostResult

setEstimatedRowCount

public void setEstimatedRowCount(long count)

Description copied from interface: org.apache.derby.iapi.store.access.StoreCostResult

Set the estimated row count.

Specified by:: setEstimatedRowCount in interface org.apache.derby.iapi.store.access.StoreCostResult

setState

public CostEstimateImpl setState(double theCost,
                                 double theRowCount,
                                 CostEstimateImpl retval)

Overview

Package

Class

Use

Deprecated

Index

Home >> All >> org >> apache >> derby >> impl >> sql >> [ compile overview ]

PREV CLASS NEXT CLASS

SUMMARY:

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Field Summary
`double`	`cost`
`double`	`rowCount`
`double`	`singleScanRowCount`

Constructor Summary
`CostEstimateImpl()`
`CostEstimateImpl(double theCost, double theRowCount, double theSingleScanRowCount)`

Method Summary
`org.apache.derby.iapi.sql.compile.CostEstimate`	`add(org.apache.derby.iapi.sql.compile.CostEstimate other, org.apache.derby.iapi.sql.compile.CostEstimate retval)` Add this cost estimate to another one.
`org.apache.derby.iapi.sql.compile.CostEstimate`	`cloneMe()` Get a copy of this CostEstimate
`double`	`compare(org.apache.derby.iapi.sql.compile.CostEstimate other)` Compare this cost estimate with the given cost estimate.
`org.apache.derby.iapi.sql.compile.CostEstimate`	`divide(double divisor, org.apache.derby.iapi.sql.compile.CostEstimate retval)` Divide this cost estimate by a scalar, non-dimensional number.
`double`	`getEstimatedCost()` Get the estimated cost.
`long`	`getEstimatedRowCount()` Get the estimated row count.
`boolean`	`isUninitialized()` Return whether or not this CostEstimate is uninitialized.
`org.apache.derby.iapi.sql.compile.CostEstimate`	`multiply(double multiplicand, org.apache.derby.iapi.sql.compile.CostEstimate retval)` Multiply this cost estimate by a scalar, non-dimensional number.
`double`	`rowCount()` Get the estimated number of rows returned by the ResultSet that this CostEstimate models.
`void`	`setCost(org.apache.derby.iapi.sql.compile.CostEstimate other)` Copy the values from the given cost estimate into this one.
`void`	`setCost(double cost, double rowCount, double singleScanRowCount)` Set the cost for this cost estimate.
`void`	`setEstimatedCost(double cost)` Set the estimated cost.
`void`	`setEstimatedRowCount(long count)` Set the estimated row count.
`void`	`setSingleScanRowCount(double singleScanRowCount)` Set the single scan row count.
`CostEstimateImpl`	`setState(double theCost, double theRowCount, CostEstimateImpl retval)`
`double`	`singleScanRowCount()` Get the estimated number of rows returned by a single scan of the ResultSet that this CostEstimate models.

org.apache.derby.impl.sql.compile Class CostEstimateImpl

cost

rowCount

singleScanRowCount

CostEstimateImpl

CostEstimateImpl

setCost

setCost

setSingleScanRowCount

compare

add

multiply

divide

rowCount

singleScanRowCount

cloneMe

isUninitialized

getEstimatedCost

setEstimatedCost

getEstimatedRowCount

setEstimatedRowCount

setState

org.apache.derby.impl.sql.compile
Class CostEstimateImpl