The format to be used for the storage of a column partition. A column partition consists either of a series of containers or a series of subrows.
You can only specify this option for a column-partitioned table.
If you do not specify either COLUMN or ROW, then Teradata Database determines which format to use based on the width of the column partition value.
As a general rule, Teradata Database assigns COLUMN format to narrow column-valued partitions and ROW format to wide column-valued partitions.
The system autocompresses data as physical rows that are inserted into a column partition of a column-partitioned table unless there are no applicable autocompression methods that reduce the size of the physical row or you specify NO AUTO COMPRESS.