org.apache.hadoop.hive.ql.optimizer.signature

Interface OpTreeSignatureFactory

All Known Implementing Classes:

OpTreeSignatureFactory.CachedFactory, OpTreeSignatureFactory.Direct

public interface OpTreeSignatureFactory

A simple cache backend to prevent repeated signature computations.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	OpTreeSignatureFactory.CachedFactory
static class	OpTreeSignatureFactory.Direct

Field Summary

Fields

Modifier and Type	Field and Description
static OpTreeSignatureFactory	DIRECT

Method Summary

Modifier and Type	Method and Description
static OpTreeSignatureFactory	direct()
OpTreeSignature	getSignature(Operator<? extends OperatorDesc> op)
static OpTreeSignatureFactory	newCache()

Field Detail

DIRECT

static final OpTreeSignatureFactory DIRECT

Method Detail

getSignature

OpTreeSignature getSignature(Operator<? extends OperatorDesc> op)

direct

static OpTreeSignatureFactory direct()

newCache

static OpTreeSignatureFactory newCache()