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

Class NullStateReaders.MemberNullStateReader

java.lang.Object

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

All Implemented Interfaces:

NullStateReader

Enclosing class:

NullStateReaders

protected static class NullStateReaders.MemberNullStateReader
extends Object
implements NullStateReader

Null state that handles the strange union semantics that both the union and the values can be null. A value is null if either the union or the value is null. (Though, presumably, in the normal case either the union is null or one of the associated values is null.)

Constructor Summary

Constructors

Constructor and Description
MemberNullStateReader(NullStateReader unionNullState, NullStateReader memberNullState)

Method Summary

Modifier and Type	Method and Description
void	bindBuffer()
void	bindIndex(ColumnReaderIndex rowIndex)
boolean	isNull()

Methods inherited from class java.lang.Object

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

Constructor Detail

MemberNullStateReader

public MemberNullStateReader(NullStateReader unionNullState,
                             NullStateReader memberNullState)

Method Detail

bindIndex

public void bindIndex(ColumnReaderIndex rowIndex)

Specified by:

bindIndex in interface NullStateReader

isNull

public boolean isNull()

Specified by:

isNull in interface NullStateReader

bindBuffer

public void bindBuffer()

Specified by:

bindBuffer in interface NullStateReader