com.yahoo.bard.webservice.table.resolver

Class DefaultPhysicalTableResolver

java.lang.Object

com.yahoo.bard.webservice.table.resolver.BasePhysicalTableResolver

com.yahoo.bard.webservice.table.resolver.DefaultPhysicalTableResolver

All Implemented Interfaces:

PhysicalTableResolver

@Singleton
public class DefaultPhysicalTableResolver
extends BasePhysicalTableResolver

A physical table resolver which implements core bard filters and comparator functions

PhysicalTable) based on the optimum (lowest query cost) table, considering completeness of data, granularity, time alignment, aggregatability constraints and cardinality for a particular query.

Field Summary

Fields

Modifier and Type	Field and Description
protected static DimensionCardinalityComparator	CARDINALITY_COMPARATOR
protected static GranularityComparator	COMPARE_GRANULARITY

Constructor Summary

Constructors

Constructor and Description
DefaultPhysicalTableResolver(PartialDataHandler partialDataHandler, VolatileIntervalsService volatileIntervalsService) Constructor.

Method Summary

Modifier and Type	Method and Description
BinaryOperator<PhysicalTable>	getBetterTableOperator(QueryPlanningConstraint requestConstraint) Create a binary operator which returns the 'better' of two physical table.
List<PhysicalTableMatcher>	getMatchers(QueryPlanningConstraint requestConstraint) Create a list of matchers based on a request and query.

Methods inherited from class com.yahoo.bard.webservice.table.resolver.BasePhysicalTableResolver

filter, filter, resolve

Methods inherited from class java.lang.Object

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

Field Detail

COMPARE_GRANULARITY

protected static final GranularityComparator COMPARE_GRANULARITY

CARDINALITY_COMPARATOR

protected static final DimensionCardinalityComparator CARDINALITY_COMPARATOR

Constructor Detail

DefaultPhysicalTableResolver

@Inject
public DefaultPhysicalTableResolver(PartialDataHandler partialDataHandler,
                                            VolatileIntervalsService volatileIntervalsService)

Constructor.

Parameters:

partialDataHandler - Handler for to use for PartialData

volatileIntervalsService - Service to get volatile intervals from

Method Detail

getMatchers

public List<PhysicalTableMatcher> getMatchers(QueryPlanningConstraint requestConstraint)

Description copied from class: BasePhysicalTableResolver

Create a list of matchers based on a request and query.

Specified by:

getMatchers in class BasePhysicalTableResolver

Parameters:

requestConstraint - contains the request constraints extracted from DataApiRequest and TemplateDruidQuery

Returns:

a list of matchers to be applied, in order

getBetterTableOperator

public BinaryOperator<PhysicalTable> getBetterTableOperator(QueryPlanningConstraint requestConstraint)

Description copied from class: BasePhysicalTableResolver

Create a binary operator which returns the 'better' of two physical table.

Specified by:

getBetterTableOperator in class BasePhysicalTableResolver

Parameters:

requestConstraint - contains the request constraints extracted from DataApiRequest and TemplateDruidQuery

Returns:

a list of matchers to be applied, in order