This example adds a column into the single-column partition for o_orderstatus, modifying the partition to be a multicolumn partition with system-determined COLUMN format and autocompression.
ALTER TABLE orders ADD o_ordersubstatus CHAR(1) CASESPECIFIC INTO o_orderstatus;
The following equivalent request performs the same actions to alter the orders table.
ALTER TABLE orders ADD (o_ordersubstatus CHAR(1) CASESPECIFIC) INTO o_orderstatus;
Both requests alter the orders table the have the following definition with o_ordersubstatus set to NULL in each row of the table.
CREATE TABLE orders ( o_orderkey INTEGER NOT NULL o_custkey INTEGER o_orderstatus CHARACTER(1) CASESPECIFIC o_totalprice DECIMAL(13,2) NOT NULL o_ordertsz TIMESTAMP(6) WITH TIME ZONE NOT NULL o_comment VARCHAR(79) o_salesperson VARCHAR(5) o_ordersubstatus CHARACTER(1) CASESPECIFIC) PARTITION BY (COLUMN ALL BUT ((o_orderstatus, o_ordersubstatus)) ADD 4, RANGE_N(o_ordertsz BETWEEN TIMESTAMP '2003-01-01 00:00:00.000000+00:00' AND TIMESTAMP '2009-12-31 23:59:59.999999+00:00' EACH INTERVAL '1' MONTH) ), UNIQUE INDEX(o_orderkey);