org.apache.drill.exec.planner

Interface PartitionDescriptor

All Superinterfaces:

Iterable<List<PartitionLocation>>

All Known Implementing Classes:

AbstractPartitionDescriptor, FileSystemPartitionDescriptor, ParquetPartitionDescriptor

public interface PartitionDescriptor
extends Iterable<List<PartitionLocation>>

Field Summary

Fields

Modifier and Type	Field and Description
static int	PARTITION_BATCH_SIZE

Method Summary

Methods

Modifier and Type	Method and Description
org.apache.calcite.rel.core.TableScan	createTableScan(List<PartitionLocation> newPartitions, boolean wasAllPartitionsPruned) Methods create a new TableScan rel node, given the lists of new partitions or new files to SCAN.
org.apache.calcite.rel.core.TableScan	createTableScan(List<PartitionLocation> newPartitions, String cacheFileRoot, boolean wasAllPartitionsPruned, MetadataContext metaContext) Create a new TableScan rel node, given the lists of new partitions or new files to scan and a path to a metadata cache file
String	getBaseTableLocation()
Integer	getIdIfValid(String name) Check to see if the name is a partition name.
int	getMaxHierarchyLevel()
int	getPartitionHierarchyIndex(String partitionName)
TypeProtos.MajorType	getVectorType(SchemaPath column, PlannerSettings plannerSettings) Method returns the Major type associated with the given column
boolean	isPartitionName(String name)
void	populatePartitionVectors(ValueVector[] vectors, List<PartitionLocation> partitions, BitSet partitionColumnBitSet, Map<Integer,String> fieldNameMap) Method creates an in memory representation of all the partitions.
boolean	supportsMetadataCachePruning()

Methods inherited from interface java.lang.Iterable

iterator

Field Detail

PARTITION_BATCH_SIZE

static final int PARTITION_BATCH_SIZE

See Also:

Constant Field Values

Method Detail

getPartitionHierarchyIndex

int getPartitionHierarchyIndex(String partitionName)

isPartitionName

boolean isPartitionName(String name)

getIdIfValid

Integer getIdIfValid(String name)

Check to see if the name is a partition name.

Parameters:

name - The field name you want to compare to partition names.

Returns:

Return index if valid, otherwise return null;

getMaxHierarchyLevel

int getMaxHierarchyLevel()

populatePartitionVectors

void populatePartitionVectors(ValueVector[] vectors,
                            List<PartitionLocation> partitions,
                            BitSet partitionColumnBitSet,
                            Map<Integer,String> fieldNameMap)

Method creates an in memory representation of all the partitions. For each level of partitioning we will create a value vector which this method will populate for all the partitions with the values of the partitioning key

Parameters:

vectors - - Array of vectors in the container that need to be populated

partitions - - List of all the partitions that exist in the table

partitionColumnBitSet - - Partition columns selected in the query

fieldNameMap - - Maps field ordinal to the field name

getVectorType

TypeProtos.MajorType getVectorType(SchemaPath column,
                                 PlannerSettings plannerSettings)

Method returns the Major type associated with the given column

Parameters:

column - - column whose type should be determined

plannerSettings -

Returns:

createTableScan

org.apache.calcite.rel.core.TableScan createTableScan(List<PartitionLocation> newPartitions,
                                                    boolean wasAllPartitionsPruned)
                                                      throws Exception

Methods create a new TableScan rel node, given the lists of new partitions or new files to SCAN.

Parameters:

newPartitions -

wasAllPartitionsPruned -

Returns:

Throws:

Exception

createTableScan

org.apache.calcite.rel.core.TableScan createTableScan(List<PartitionLocation> newPartitions,
                                                    String cacheFileRoot,
                                                    boolean wasAllPartitionsPruned,
                                                    MetadataContext metaContext)
                                                      throws Exception

Create a new TableScan rel node, given the lists of new partitions or new files to scan and a path to a metadata cache file

Parameters:

newPartitions -

cacheFileRoot -

wasAllPartitionsPruned -

metaContext -

Returns:

Throws:

Exception

supportsMetadataCachePruning

boolean supportsMetadataCachePruning()

getBaseTableLocation

String getBaseTableLocation()