org.apache.hadoop.hive.ql.optimizer.calcite.cost

Class HiveCost

java.lang.Object

org.apache.hadoop.hive.ql.optimizer.calcite.cost.HiveCost

All Implemented Interfaces:

org.apache.calcite.plan.RelOptCost

public class HiveCost
extends Object
implements org.apache.calcite.plan.RelOptCost

NOTE:
1. Hivecost normalizes cpu and io in to time.
2. CPU, IO cost is added together to find the query latency.
3. If query latency is equal then row count is compared.

Field Summary

Fields

Modifier and Type	Field and Description
static org.apache.calcite.plan.RelOptCostFactory	FACTORY
static HiveCost	HUGE
static HiveCost	INFINITY
static HiveCost	TINY
static HiveCost	ZERO

Method Summary

Methods

Modifier and Type	Method and Description
double	divideBy(org.apache.calcite.plan.RelOptCost cost)
boolean	equals(org.apache.calcite.plan.RelOptCost other)
double	getCpu()
double	getIo()
double	getRows()
boolean	isEqWithEpsilon(org.apache.calcite.plan.RelOptCost other)
boolean	isInfinite()
boolean	isLe(org.apache.calcite.plan.RelOptCost other)
boolean	isLt(org.apache.calcite.plan.RelOptCost other)
org.apache.calcite.plan.RelOptCost	minus(org.apache.calcite.plan.RelOptCost other)
org.apache.calcite.plan.RelOptCost	multiplyBy(double factor)
org.apache.calcite.plan.RelOptCost	plus(org.apache.calcite.plan.RelOptCost other)
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

INFINITY

public static final HiveCost INFINITY

HUGE

public static final HiveCost HUGE

ZERO

public static final HiveCost ZERO

TINY

public static final HiveCost TINY

FACTORY

public static final org.apache.calcite.plan.RelOptCostFactory FACTORY

Method Detail

getCpu

public double getCpu()

Specified by:

getCpu in interface org.apache.calcite.plan.RelOptCost

isInfinite

public boolean isInfinite()

Specified by:

isInfinite in interface org.apache.calcite.plan.RelOptCost

getIo

public double getIo()

Specified by:

getIo in interface org.apache.calcite.plan.RelOptCost

isLe

public boolean isLe(org.apache.calcite.plan.RelOptCost other)

Specified by:

isLe in interface org.apache.calcite.plan.RelOptCost

isLt

public boolean isLt(org.apache.calcite.plan.RelOptCost other)

Specified by:

isLt in interface org.apache.calcite.plan.RelOptCost

getRows

public double getRows()

Specified by:

getRows in interface org.apache.calcite.plan.RelOptCost

equals

public boolean equals(org.apache.calcite.plan.RelOptCost other)

Specified by:

equals in interface org.apache.calcite.plan.RelOptCost

isEqWithEpsilon

public boolean isEqWithEpsilon(org.apache.calcite.plan.RelOptCost other)

Specified by:

isEqWithEpsilon in interface org.apache.calcite.plan.RelOptCost

minus

public org.apache.calcite.plan.RelOptCost minus(org.apache.calcite.plan.RelOptCost other)

Specified by:

minus in interface org.apache.calcite.plan.RelOptCost

multiplyBy

public org.apache.calcite.plan.RelOptCost multiplyBy(double factor)

Specified by:

multiplyBy in interface org.apache.calcite.plan.RelOptCost

divideBy

public double divideBy(org.apache.calcite.plan.RelOptCost cost)

Specified by:

divideBy in interface org.apache.calcite.plan.RelOptCost

plus

public org.apache.calcite.plan.RelOptCost plus(org.apache.calcite.plan.RelOptCost other)

Specified by:

plus in interface org.apache.calcite.plan.RelOptCost

toString

public String toString()

Specified by:

toString in interface org.apache.calcite.plan.RelOptCost

Overrides:

toString in class Object