org.apache.drill.exec.planner

Interface PartitionLocation

All Known Implementing Classes:

DFSDirPartitionLocation, DFSFilePartitionLocation, ParquetPartitionLocation, SimplePartitionLocation

public interface PartitionLocation

Interface to define a partition. Partition could be simple, which represents a basic unit for partition, determined by the underlying storage plugin. On file system, a simple partition represents a file. Partition could be composite, consisting of other partitions. On file system storage plugin, a composite partition corresponds to a directory. Simple partition location keeps track the string representation of partition and also stores the value of the individual partition keys for this partition. Composite partition location keeps track the common partition keys, but does not keep track the the string representation of partition and leave it to each individual simple partition it consists of.

Method Summary

Methods

Modifier and Type	Method and Description
String	getCompositePartitionPath() Returns the path string of directory names only for composite partition
String	getEntirePartitionLocation() Returns the string representation of this partition.
List<SimplePartitionLocation>	getPartitionLocationRecursive() Returns the list of the non-composite partitions that this partition consists of.
String	getPartitionValue(int index) Returns the value of the 'index' partition column
boolean	isCompositePartition() Returns if this is a simple or composite partition.

Method Detail

getPartitionValue

String getPartitionValue(int index)

Returns the value of the 'index' partition column

getEntirePartitionLocation

String getEntirePartitionLocation()

Returns the string representation of this partition. Only a non-composite partition supports this.

getPartitionLocationRecursive

List<SimplePartitionLocation> getPartitionLocationRecursive()

Returns the list of the non-composite partitions that this partition consists of.

isCompositePartition

boolean isCompositePartition()

Returns if this is a simple or composite partition.

getCompositePartitionPath

String getCompositePartitionPath()

Returns the path string of directory names only for composite partition