Package io.trino.sql.planner.iterative.rule

Class DistinctAggregationStrategyChooser

java.lang.Object

io.trino.sql.planner.iterative.rule.DistinctAggregationStrategyChooser

public class DistinctAggregationStrategyChooser
extends Object

Controls which implementation of distinct aggregation should be used for particular AggregationNode

Constructor Summary

Constructors

Constructor	Description
DistinctAggregationStrategyChooser(TaskCountEstimator taskCountEstimator, Metadata metadata)

Method Summary

Modifier and Type	Method	Description
static DistinctAggregationStrategyChooser	createDistinctAggregationStrategyChooser(TaskCountEstimator taskCountEstimator, Metadata metadata)
boolean	shouldAddMarkDistinct(AggregationNode aggregationNode, Session session, StatsProvider statsProvider, Lookup lookup)
boolean	shouldSplitToSubqueries(AggregationNode aggregationNode, Session session, StatsProvider statsProvider, Lookup lookup)
boolean	shouldUsePreAggregate(AggregationNode aggregationNode, Session session, StatsProvider statsProvider, Lookup lookup)

Methods inherited from class java.lang.Object

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

Constructor Details

DistinctAggregationStrategyChooser

public DistinctAggregationStrategyChooser(TaskCountEstimator taskCountEstimator,
 Metadata metadata)

Method Details

createDistinctAggregationStrategyChooser

public static DistinctAggregationStrategyChooser createDistinctAggregationStrategyChooser(TaskCountEstimator taskCountEstimator,
 Metadata metadata)

shouldAddMarkDistinct

public boolean shouldAddMarkDistinct(AggregationNode aggregationNode,
 Session session,
 StatsProvider statsProvider,
 Lookup lookup)

shouldUsePreAggregate

public boolean shouldUsePreAggregate(AggregationNode aggregationNode,
 Session session,
 StatsProvider statsProvider,
 Lookup lookup)

shouldSplitToSubqueries

public boolean shouldSplitToSubqueries(AggregationNode aggregationNode,
 Session session,
 StatsProvider statsProvider,
 Lookup lookup)