org.apache.sysds.runtime.compress.cocode

Class ColumnGroupPartitionerStatic

java.lang.Object

org.apache.sysds.runtime.compress.cocode.ColumnGroupPartitioner

org.apache.sysds.runtime.compress.cocode.ColumnGroupPartitionerStatic

public class ColumnGroupPartitionerStatic
extends ColumnGroupPartitioner

Column group partitioning with static distribution heuristic.

Constructor Summary

Constructors

Constructor and Description
ColumnGroupPartitionerStatic()

Method Summary

Modifier and Type	Method and Description
List<int[]>	partitionColumns(List<Integer> groupCols, HashMap<Integer,PlanningCoCoder.GroupableColInfo> groupColsInfo, CompressionSettings cs) Partitions a list of columns into a list of partitions that contains subsets of columns.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ColumnGroupPartitionerStatic

public ColumnGroupPartitionerStatic()

Method Detail

partitionColumns

public List<int[]> partitionColumns(List<Integer> groupCols,
                                    HashMap<Integer,PlanningCoCoder.GroupableColInfo> groupColsInfo,
                                    CompressionSettings cs)

Description copied from class: ColumnGroupPartitioner

Partitions a list of columns into a list of partitions that contains subsets of columns. Note that this call must compute a complete and disjoint partitioning.

Specified by:

partitionColumns in class ColumnGroupPartitioner

Parameters:

groupCols - list of columns

groupColsInfo - list of column infos

cs - The Compression settings used for the compression

Returns:

list of partitions (where each partition is a list of columns)