org.apache.drill.exec.physical.resultSet.model.single

Class DirectRowIndex

java.lang.Object

org.apache.drill.exec.physical.resultSet.model.ReaderIndex

org.apache.drill.exec.physical.resultSet.model.single.DirectRowIndex

All Implemented Interfaces:

ColumnReaderIndex

public class DirectRowIndex
extends ReaderIndex

Reader index that points directly to each row in the row set. This index starts with pointing to the -1st row, so that the reader can require a next() for every row, including the first. (This is the JDBC RecordSet convention.)

Field Summary

Fields inherited from class org.apache.drill.exec.physical.resultSet.model.ReaderIndex

position, rowCount

Constructor Summary

Constructors

Constructor and Description
DirectRowIndex(VectorContainer container)

Method Summary

Modifier and Type	Method and Description
int	hyperVectorIndex() When used with a hyper-vector (SV4) based batch, returns the index of the current batch within the hyper-batch.
int	offset() Vector offset to read.

Methods inherited from class org.apache.drill.exec.physical.resultSet.model.ReaderIndex

hasNext, logicalIndex, next, set, size

Methods inherited from class java.lang.Object

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

Constructor Detail

DirectRowIndex

public DirectRowIndex(VectorContainer container)

Method Detail

offset

public int offset()

Description copied from interface: ColumnReaderIndex

Vector offset to read. For top-level vectors, the offset may be through an indirection (SV2 or SV4). For arrays, the offset is the absolute position, with the vector of the current array element.

Returns:

vector read index

hyperVectorIndex

public int hyperVectorIndex()

Description copied from interface: ColumnReaderIndex

When used with a hyper-vector (SV4) based batch, returns the index of the current batch within the hyper-batch. If this is a single batch, or a nested index, then always returns 0.

Returns:

batch index of the current row within the hyper-batch