ADD COLUMN (column_name) - Teradata Vantage

Add the column set as a new column partition. 
For information about naming database objects, see Object Names.
The table must be column-partitioned and the columns being added cannot already exist. You cannot alter a join index to add columns or column partitions using an ALTER TABLE request. Specifies column storage format for the column_name or column_name group. Alters the column partition containing the column to have COLUMN format. If you do not specify COLUMN, ROW, or SYSTEM format and the column partition containing the column:

• Does not have a system-determined format, the column partition is not altered and the format remains as most recently defined.
• Has a system-determined format, the format remains system-defined.

  If the altered column partition containing the column has a system-determined column partition format, the column partition is altered to a newly appropriate format.