org.apache.drill.exec.store

Interface SchemaPartitionExplorer

All Known Implementing Classes:

AbstractSchema, FileSystemSchemaFactory.FileSystemSchema, SubSchemaWrapper, WorkspaceSchemaFactory.WorkspaceSchema

public interface SchemaPartitionExplorer

Exposes partition information for a particular schema. For a more explanation of the current use of this interface see the documentation in PartitionExplorer.

Method Summary

Methods

Modifier and Type	Method and Description
Iterable<String>	getSubPartitions(String table, List<String> partitionColumns, List<String> partitionValues) Get a list of sub-partitions of a particular table and the partitions specified by partition columns and values.

Method Detail

getSubPartitions

Iterable<String> getSubPartitions(String table,
                                List<String> partitionColumns,
                                List<String> partitionValues)
                                  throws PartitionNotFoundException

Get a list of sub-partitions of a particular table and the partitions specified by partition columns and values. Individual storage plugins will assign specific meaning to the parameters and return values. For more info see docs in PartitionExplorer.

Parameters:

partitionColumns - a list of partitions to match

partitionValues - list of values of each partition (corresponding to the partition column list)

Returns:

list of sub-partitions, will be empty if a there is no further level of sub-partitioning below, i.e. hit a leaf partition

Throws:

PartitionNotFoundException - when the partition does not exist in the given workspace