Package org.apache.sysds.runtime.compress.colgroup

Class Summary

Class	Description
AColGroup	Abstract Class that is the lowest class type for the Compression framework.
ColGroupCompressed	Base class for column groups encoded Encoded in a compressed manner.
ColGroupConst
ColGroupDDC	Class to encapsulate information about a column group that is encoded with dense dictionary encoding (DDC).
ColGroupEmpty
ColGroupFactory	Factory pattern for constructing ColGroups.
ColGroupIO	This has the IO responsibility of ColGroups, such that it enables to read and write ColGroups to and from a DataInput and DataOutput
ColGroupOffset	Base class for column groups encoded with various types of bitmap encoding.
ColGroupOLE	Class to encapsulate information about a column group that is encoded with simple lists of offsets for each set of distinct values.
ColGroupRLE	A group of columns compressed with a single run-length encoded bitmap.
ColGroupSDC	Column group that sparsely encodes the dictionary values.
ColGroupSDCSingle	Column group that sparsely encodes the dictionary values.
ColGroupSDCSingleZeros	Column group that sparsely encodes the dictionary values.
ColGroupSDCZeros	Column group that sparsely encodes the dictionary values.
ColGroupSizes
ColGroupUncompressed	Column group type for columns that are stored as dense arrays of doubles.
ColGroupValue	Base class for column groups encoded with value dictionary.

Enum Summary

Enum	Description
AColGroup.CompressionType	Public super types of compression ColGroups supported