Package io.trino.sql.planner.optimizations

Class HashGenerationOptimizer

java.lang.Object

io.trino.sql.planner.optimizations.HashGenerationOptimizer

All Implemented Interfaces:

PlanOptimizer

public class HashGenerationOptimizer
extends Object
implements PlanOptimizer

Field Summary

Fields

Modifier and Type	Field	Description
static final int	INITIAL_HASH_VALUE

Constructor Summary

Constructors

Constructor	Description
HashGenerationOptimizer(Metadata metadata)

Method Summary

Modifier and Type	Method	Description
static Optional<Expression>	getHashExpression(Metadata metadata, SymbolAllocator symbolAllocator, List<Symbol> symbols)
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

Field Details

INITIAL_HASH_VALUE

public static final int INITIAL_HASH_VALUE

See Also:

• Constant Field Values

Constructor Details

HashGenerationOptimizer

public HashGenerationOptimizer(Metadata metadata)

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

getHashExpression

public static Optional<Expression> getHashExpression(Metadata metadata,
 SymbolAllocator symbolAllocator,
 List<Symbol> symbols)