## Uses of Class
org.apache.sysds.runtime.compress.colgroup.ColGroupDDC

- Packages that use ColGroupDDC
  Package | Description
  --- | ---
  org.apache.sysds.runtime.compress.colgroup |

- - ### Uses of ColGroupDDC in org.apache.sysds.runtime.compress.colgroup

    Subclasses of ColGroupDDC in org.apache.sysds.runtime.compress.colgroup
    Modifier and Type | Class | Description
    --- | --- | ---
    `class` | `ColGroupDeltaDDC` | Class to encapsulate information about a column group that is first delta encoded then encoded with dense dictionary encoding (DeltaDDC).

    Methods in org.apache.sysds.runtime.compress.colgroup with parameters of type ColGroupDDC
    Modifier and Type | Method | Description
    --- | --- | ---
    `void` | ColGroupDDC.`preAggregateThatDDCStructure​(ColGroupDDC that, Dictionary ret)` |
    `void` | ColGroupSDCSingleZeros.`preAggregateThatDDCStructure​(ColGroupDDC that, Dictionary ret)` |
    `void` | ColGroupSDCZeros.`preAggregateThatDDCStructure​(ColGroupDDC that, Dictionary ret)` |