org.apache.drill.exec.physical.resultSet.impl

Class SingleVectorState.OffsetVectorState

java.lang.Object

org.apache.drill.exec.physical.resultSet.impl.SingleVectorState

org.apache.drill.exec.physical.resultSet.impl.SingleVectorState.OffsetVectorState

All Implemented Interfaces:

VectorState

Enclosing class:

SingleVectorState

public static class SingleVectorState.OffsetVectorState
extends SingleVectorState

Special case for an offset vector. Offset vectors are managed like any other vector with respect to overflow and allocation. This means that the loader classes avoid the use of the RepeatedVector class methods, instead working with the offsets vector (here) or the values vector to allow the needed fine control over overflow operations.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.drill.exec.physical.resultSet.impl.SingleVectorState

SingleVectorState.FixedWidthVectorState, SingleVectorState.IsSetVectorState, SingleVectorState.OffsetVectorState, SingleVectorState.SimpleVectorState, SingleVectorState.VariableWidthVectorState

Field Summary

Fields inherited from class org.apache.drill.exec.physical.resultSet.impl.SingleVectorState

backupVector, mainVector, writer

Constructor Summary

Constructors

Constructor and Description
OffsetVectorState(WriterEvents writer, ValueVector mainVector, WriterPosition childWriter)

Method Summary

Modifier and Type	Method and Description
int	allocateVector(ValueVector toAlloc, int cardinality)
protected void	copyOverflow(int sourceStartIndex, int sourceEndIndex)
int	rowStartOffset()
void	setChildWriter(WriterEvents childWriter)

Methods inherited from class org.apache.drill.exec.physical.resultSet.impl.SingleVectorState

allocate, close, dump, harvestWithLookAhead, isProjected, parseVectorType, rollover, startBatchWithLookAhead, vector, vectorState

Methods inherited from class java.lang.Object

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

Constructor Detail

OffsetVectorState

public OffsetVectorState(WriterEvents writer,
                         ValueVector mainVector,
                         WriterPosition childWriter)

Method Detail

setChildWriter

public void setChildWriter(WriterEvents childWriter)

allocateVector

public int allocateVector(ValueVector toAlloc,
                          int cardinality)

Specified by:

allocateVector in class SingleVectorState

rowStartOffset

public int rowStartOffset()

copyOverflow

protected void copyOverflow(int sourceStartIndex,
                            int sourceEndIndex)

Specified by:

copyOverflow in class SingleVectorState