Package io.trino.sql.planner.optimizations

Class MetadataQueryOptimizer

java.lang.Object

io.trino.sql.planner.optimizations.MetadataQueryOptimizer

All Implemented Interfaces:

PlanOptimizer

public class MetadataQueryOptimizer
extends Object
implements PlanOptimizer

Converts cardinality-insensitive aggregations (max, min, "distinct") over partition keys into simple metadata queries

Constructor Summary

Constructors

Constructor	Description
MetadataQueryOptimizer(PlannerContext plannerContext)

Method Summary

Modifier and Type	Method	Description
PlanNode	optimize(PlanNode plan, Session session, TypeProvider types, SymbolAllocator symbolAllocator, PlanNodeIdAllocator idAllocator, WarningCollector warningCollector, PlanOptimizersStatsCollector planOptimizersStatsCollector, TableStatsProvider tableStatsProvider)

Methods inherited from class java.lang.Object

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

Constructor Details

MetadataQueryOptimizer

public MetadataQueryOptimizer(PlannerContext plannerContext)

Method Details

optimize

public PlanNode optimize(PlanNode plan,
 Session session,
 TypeProvider types,
 SymbolAllocator symbolAllocator,
 PlanNodeIdAllocator idAllocator,
 WarningCollector warningCollector,
 PlanOptimizersStatsCollector planOptimizersStatsCollector,
 TableStatsProvider tableStatsProvider)

Specified by:

optimize in interface PlanOptimizer