org.apache.drill.exec.physical.rowSet

Class IndirectRowIndex

java.lang.Object

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

org.apache.drill.exec.physical.rowSet.IndirectRowIndex

All Implemented Interfaces:

ColumnReaderIndex

public class IndirectRowIndex
extends ReaderIndex

Reader index that points to each row indirectly through the selection vector. The offset() method points to the actual data row, while the ReaderIndex.logicalIndex() method gives the position relative to the indirection vector. That is, the position increases monotonically, but the index jumps around as specified by the indirection vector.

Field Summary

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

position, rowCount

Constructor Summary

Constructors

Constructor and Description
IndirectRowIndex(SelectionVector2 sv2)

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

IndirectRowIndex

public IndirectRowIndex(SelectionVector2 sv2)

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