| Package | Description | 
|---|---|
| org.apache.sysds.runtime.compress.colgroup | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | ColGroupDDCClass to encapsulate information about a column group that is encoded with dense dictionary encoding (DDC). | 
| class  | ColGroupDDC1Class to encapsulate information about a column group that is encoded with dense dictionary encoding (DDC) using 1
 byte codes. | 
| class  | ColGroupDDC2Class to encapsulate information about a column group that is encoded with dense dictionary encoding (DDC) using 2
 byte codes. | 
| class  | ColGroupOffsetBase class for column groups encoded with various types of bitmap encoding. | 
| class  | ColGroupOLEClass to encapsulate information about a column group that is encoded with simple lists of offsets for each set of
 distinct values. | 
| class  | ColGroupRLEA group of columns compressed with a single run-length encoded bitmap. | 
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