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

Packages that use ColGroupDDC
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
`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
`void` ColGroupDDC.`preAggregateThatDDCStructure​(ColGroupDDC that, Dictionary ret)`
`void` ColGroupSDCSingleZeros.`preAggregateThatDDCStructure​(ColGroupDDC that, Dictionary ret)`
`void` ColGroupSDCZeros.`preAggregateThatDDCStructure​(ColGroupDDC that, Dictionary ret)`