com.facebook.presto.hive.rule

Class HiveFilterPushdown

java.lang.Object

com.facebook.presto.hive.rule.HiveFilterPushdown

All Implemented Interfaces:

ConnectorPlanOptimizer

public class HiveFilterPushdown
extends Object
implements ConnectorPlanOptimizer

Runs during both logical and physical phases of connector-aided plan optimization. In most cases filter pushdown will occur during logical phase. However, in cases when new filter is added between logical and physical phases, e.g. a filter on a join key from one side of a join is added to the other side, the new filter will get merged with the one already pushed down.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	HiveFilterPushdown.SubfieldExtractionRewriter

Field Summary

Fields

Modifier and Type	Field and Description
protected HiveTransactionManager	transactionManager

Constructor Summary

Constructors

Constructor and Description
HiveFilterPushdown(RowExpressionService rowExpressionService, StandardFunctionResolution functionResolution, FunctionMetadataManager functionMetadataManager, HiveTransactionManager transactionManager, HivePartitionManager partitionManager)

Method Summary

Modifier and Type	Method and Description
static ConnectorMetadata	getConnectorMetadata(HiveTransactionManager transactionManager, TableHandle tableHandle)
PlanNode	optimize(PlanNode maxSubplan, ConnectorSession session, VariableAllocator variableAllocator, PlanNodeIdAllocator idAllocator)

Methods inherited from class java.lang.Object

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

Field Detail

transactionManager

protected final HiveTransactionManager transactionManager

Constructor Detail

HiveFilterPushdown

public HiveFilterPushdown(RowExpressionService rowExpressionService,
                          StandardFunctionResolution functionResolution,
                          FunctionMetadataManager functionMetadataManager,
                          HiveTransactionManager transactionManager,
                          HivePartitionManager partitionManager)

Method Detail

optimize

public PlanNode optimize(PlanNode maxSubplan,
                         ConnectorSession session,
                         VariableAllocator variableAllocator,
                         PlanNodeIdAllocator idAllocator)

Specified by:

optimize in interface ConnectorPlanOptimizer

getConnectorMetadata

public static ConnectorMetadata getConnectorMetadata(HiveTransactionManager transactionManager,
                                                     TableHandle tableHandle)