Package io.trino.cost

Class FilterProjectAggregationStatsRule

java.lang.Object

io.trino.cost.SimpleStatsRule<FilterNode>

io.trino.cost.FilterProjectAggregationStatsRule

All Implemented Interfaces:

ComposableStatsCalculator.Rule<FilterNode>

public class FilterProjectAggregationStatsRule
extends SimpleStatsRule<FilterNode>

AggregationStatsRule does not have sufficient information to provide accurate estimates on aggregated symbols. This rule finds unestimated filters on top of aggregations whose output row count was estimated and returns estimated row count of (UNKNOWN_FILTER_COEFFICIENT * aggregation output row count) for the filter.

Constructor Summary

Constructors

Constructor	Description
FilterProjectAggregationStatsRule(StatsNormalizer normalizer, FilterStatsCalculator filterStatsCalculator)

Method Summary

Modifier and Type	Method	Description
protected Optional<PlanNodeStatsEstimate>	doCalculate(FilterNode node, StatsCalculator.Context context)
Pattern<FilterNode>	getPattern()

Methods inherited from class io.trino.cost.SimpleStatsRule

calculate

Methods inherited from class java.lang.Object

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

Constructor Details

FilterProjectAggregationStatsRule

public FilterProjectAggregationStatsRule(StatsNormalizer normalizer,
 FilterStatsCalculator filterStatsCalculator)

Method Details

getPattern

public Pattern<FilterNode> getPattern()

doCalculate

protected Optional<PlanNodeStatsEstimate> doCalculate(FilterNode node,
 StatsCalculator.Context context)

Specified by:

doCalculate in class SimpleStatsRule<FilterNode>