org.apache.drill.exec.vector.accessor.reader

Class NullStateReaders

java.lang.Object

org.apache.drill.exec.vector.accessor.reader.NullStateReaders

public class NullStateReaders
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected static class	NullStateReaders.AlwaysNullStateReader
protected static class	NullStateReaders.ComplexMemberStateReader Handle the awkward situation with complex types.
protected static class	NullStateReaders.ListIsSetVectorStateReader Holder for the NullableVector wrapper around a bits vector and a data vector.
protected static class	NullStateReaders.MemberNullStateReader Null state that handles the strange union semantics that both the union and the values can be null.
protected static class	NullStateReaders.NullableIsSetVectorStateReader Holder for the NullableVector wrapper around a bits vector and a data vector.
protected static class	NullStateReaders.RequiredStateReader Dummy implementation of a null state reader for cases in which the value is never null.
protected static class	NullStateReaders.TypeVectorStateReader Extract null state from the union vector's type vector.

Field Summary

Fields

Modifier and Type	Field and Description
static NullStateReader	NULL_STATE_READER
static NullStateReaders.RequiredStateReader	REQUIRED_STATE_READER

Method Summary

Methods inherited from class java.lang.Object

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

Field Detail

REQUIRED_STATE_READER

public static final NullStateReaders.RequiredStateReader REQUIRED_STATE_READER

NULL_STATE_READER

public static final NullStateReader NULL_STATE_READER