org.apache.lens.cube.query.cost

Class FactPartitionBasedQueryCostCalculator

java.lang.Object

org.apache.lens.cube.query.cost.FactPartitionBasedQueryCostCalculator

All Implemented Interfaces:

QueryCostCalculator

public class FactPartitionBasedQueryCostCalculator
extends Object
implements QueryCostCalculator

Field Summary

Fields

Modifier and Type	Field and Description
static String	UPDATE_PERIOD_WEIGHT_PREFIX

Constructor Summary

Constructors

Constructor and Description
FactPartitionBasedQueryCostCalculator()

Method Summary

Methods

Modifier and Type	Method and Description
QueryCost	calculateCost(AbstractQueryContext queryContext, LensDriver driver)
Map<String,Set<?>>	getAllPartitions(AbstractQueryContext queryContext, LensDriver driver)

Methods inherited from class java.lang.Object

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

Field Detail

UPDATE_PERIOD_WEIGHT_PREFIX

public static final String UPDATE_PERIOD_WEIGHT_PREFIX

See Also:

Constant Field Values

Constructor Detail

FactPartitionBasedQueryCostCalculator

public FactPartitionBasedQueryCostCalculator()

Method Detail

calculateCost

public QueryCost calculateCost(AbstractQueryContext queryContext,
                      LensDriver driver)
                        throws LensException

Specified by:

calculateCost in interface QueryCostCalculator

Returns:

calculated cost based on anything available in abstract query context

Throws:

LensException - when can't calculate cost

getAllPartitions

public Map<String,Set<?>> getAllPartitions(AbstractQueryContext queryContext,
                                  LensDriver driver)