io.prestosql.sql.planner.optimizations

Class MetadataDeleteOptimizer

java.lang.Object

io.prestosql.sql.planner.optimizations.MetadataDeleteOptimizer

All Implemented Interfaces:

PlanOptimizer

public class MetadataDeleteOptimizer
extends Object
implements PlanOptimizer

Converts delete followed immediately by table scan to a special metadata-only delete node

Turn

     TableCommit - Delete - TableScanNode (no node allowed in between except Exchanges)
 

into

     MetadataDelete
 

Constructor Summary

Constructors

Constructor and Description
MetadataDeleteOptimizer(Metadata metadata)

Method Summary

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

Methods inherited from class java.lang.Object

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

Constructor Detail

MetadataDeleteOptimizer

public MetadataDeleteOptimizer(Metadata metadata)

Method Detail

optimize

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

Specified by:

optimize in interface PlanOptimizer