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

Class HiveDefaultCostModel

java.lang.Object

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

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

public class HiveDefaultCostModel
extends HiveCostModel

Default implementation of the cost model. Currently used by MR and Spark execution engines.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	HiveDefaultCostModel.DefaultJoinAlgorithm Default join algorithm.

Nested classes/interfaces inherited from class org.apache.hadoop.hive.ql.optimizer.calcite.cost.HiveCostModel

HiveCostModel.JoinAlgorithm

Method Summary

Modifier and Type	Method and Description
org.apache.calcite.plan.RelOptCost	getAggregateCost(HiveAggregate aggregate)
static HiveDefaultCostModel	getCostModel()
org.apache.calcite.plan.RelOptCost	getDefaultCost()
org.apache.calcite.plan.RelOptCost	getScanCost(HiveTableScan ts, org.apache.calcite.rel.metadata.RelMetadataQuery mq)

Methods inherited from class org.apache.hadoop.hive.ql.optimizer.calcite.cost.HiveCostModel

getJoinCost

Methods inherited from class java.lang.Object

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

Method Detail

getCostModel

public static HiveDefaultCostModel getCostModel()

getDefaultCost

public org.apache.calcite.plan.RelOptCost getDefaultCost()

Specified by:

getDefaultCost in class HiveCostModel

getScanCost

public org.apache.calcite.plan.RelOptCost getScanCost(HiveTableScan ts,
                                                      org.apache.calcite.rel.metadata.RelMetadataQuery mq)

Specified by:

getScanCost in class HiveCostModel

getAggregateCost

public org.apache.calcite.plan.RelOptCost getAggregateCost(HiveAggregate aggregate)

Specified by:

getAggregateCost in class HiveCostModel