org.apache.druid.segment.join.filter

Class JoinFilterAnalysis

java.lang.Object

org.apache.druid.segment.join.filter.JoinFilterAnalysis

public class JoinFilterAnalysis
extends Object

Holds information about: - whether a filter can be pushed down - if it needs to be retained after the join, - a reference to the original filter - a potentially rewritten filter to be pushed down to the base table - a list of virtual columns that need to be created on the base table to support the pushed down filter

Constructor Summary

Constructors

Constructor and Description
JoinFilterAnalysis(boolean retainAfterJoin, Filter originalFilter, Filter pushDownFilter)

Method Summary

Modifier and Type	Method and Description
static JoinFilterAnalysis	createNoPushdownFilterAnalysis(Filter originalFilter) Utility method for generating an analysis that represents: "Filter cannot be pushed down"
Filter	getOriginalFilter()
Optional<Filter>	getPushDownFilter()
boolean	isCanPushDown()
boolean	isRetainAfterJoin()

Methods inherited from class java.lang.Object

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

Constructor Detail

JoinFilterAnalysis

public JoinFilterAnalysis(boolean retainAfterJoin,
                          Filter originalFilter,
                          @Nullable
                          Filter pushDownFilter)

Method Detail

isCanPushDown

public boolean isCanPushDown()

isRetainAfterJoin

public boolean isRetainAfterJoin()

getOriginalFilter

public Filter getOriginalFilter()

getPushDownFilter

public Optional<Filter> getPushDownFilter()

createNoPushdownFilterAnalysis

public static JoinFilterAnalysis createNoPushdownFilterAnalysis(Filter originalFilter)

Utility method for generating an analysis that represents: "Filter cannot be pushed down"

Parameters:

originalFilter - The original filter which cannot be pushed down

Returns:

analysis that represents: "Filter cannot be pushed down"