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

Nested Class Summary

Nested classes/interfaces inherited from interface io.trino.sql.planner.optimizations.PlanOptimizer

PlanOptimizer.Context

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, PlanOptimizer.Context context)

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,
 PlanOptimizer.Context context)

Specified by:

optimize in interface PlanOptimizer

getHashExpression

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