org.apache.drill.exec.physical.impl.scan.file

Class PartitionColumn

java.lang.Object

org.apache.drill.exec.physical.impl.scan.project.ResolvedColumn

org.apache.drill.exec.physical.impl.scan.file.MetadataColumn

org.apache.drill.exec.physical.impl.scan.file.PartitionColumn

All Implemented Interfaces:

ColumnProjection, ConstantColumnLoader.ConstantColumnSpec

public class PartitionColumn
extends MetadataColumn

Represents a partition column (usually dir0, dir1, ...). This is an implicit column that has a variable part: the partition index.

Field Summary

Fields

Modifier and Type	Field and Description
protected int	partition

Constructor Summary

Constructors

Constructor and Description
PartitionColumn(String name, int partition)
PartitionColumn(String name, int partition, FileMetadata fileInfo, VectorSource source, int sourceIndex)

Method Summary

Modifier and Type	Method and Description
static TypeProtos.MajorType	dataType()
int	partition()
MetadataColumn	resolve(FileMetadata fileInfo, VectorSource source, int sourceIndex)

Methods inherited from class org.apache.drill.exec.physical.impl.scan.file.MetadataColumn

name, schema, toString, value

Methods inherited from class org.apache.drill.exec.physical.impl.scan.project.ResolvedColumn

metadata, project, source, sourceIndex

Methods inherited from class java.lang.Object

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

Field Detail

partition

protected final int partition

Constructor Detail

PartitionColumn

public PartitionColumn(String name,
                       int partition)

PartitionColumn

public PartitionColumn(String name,
                       int partition,
                       FileMetadata fileInfo,
                       VectorSource source,
                       int sourceIndex)

Method Detail

partition

public int partition()

resolve

public MetadataColumn resolve(FileMetadata fileInfo,
                              VectorSource source,
                              int sourceIndex)

Specified by:

resolve in class MetadataColumn

dataType

public static TypeProtos.MajorType dataType()