ALTER TABLE ADD ROW (column_name) Examples - Advanced SQL Engine - Teradata Database

Example: Adding a ROW-Formatted Column Partition to a Column-Partitioned Table

The following example adds a two-column row partition to the column-partitioned orders table with user-specified ROW format and no autocompression.

     ALTER TABLE orders 
     ADD ROW(o_ship_addr VARCHAR(500), o_bill_addr VARCHAR(200)) 
     NO AUTO COMPRESS;

This produces the following a table definition with the new columns set to NULL.

     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,
       o_comment_ext1   VARCHAR(79),
       o_comment_ext2   VARCHAR(79),
       o_ship_addr      VARCHAR(500),
       o_bill_addr      VARCHAR(200) )
     PARTITION BY (COLUMN ALL BUT((o_ o_orderstatus, o_ordersubstatus),
                                 (o_comment, o_comment_ext1,
                                   o_comment_ext2), ROW(o_ship_addr,
                                  o_bill_addr) NO AUTO COMPRESS)) ADD 3,
                   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);

Example: Adding a Two-Column Partition with ROW Format to a Table with a Primary AMP Index

Assume the following table definition, with autocompression as the default.

CREATE TABLE Orders
    ( o_orderkey INTEGER NOT NULL,
      o_custkey INTEGER,
      o_orderstatus CHAR(1) CASESPECIFIC,
      o_totalprice DECIMAL(13,2) NOT NULL,
      o_ordertsz TIMESTAMP(6) WITH TIME ZONE NOT NULL,
      o_comment VARCHAR(79) )
  PRIMARY AMP INDEX (o_orderkey), PARTITION BY COLUMN,
  UNIQUE INDEX (o_orderkey);

The following ALTER TABLE statement adds a two-column partition to the table, with user-specified ROW format and autocompression by default:

ALTER TABLE Orders 
  ADD ROW(o_ship_addr VARCHAR(500), o_bill_addr VARCHAR(200)) AUTO COMPRESS;

This results in a table definition as follows:

CREATE TABLE Orders
    ( o_orderkey INTEGER NOT NULL,
      o_custkey INTEGER,
      o_orderstatus CHAR(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 CHAR(1) CASESPECIFIC,
      o_comment_ext1 VARCHAR(79),
      o_comment_ext2 VARCHAR(79),
      o_ship_addr VARCHAR(500),
      o_bill_addr VARCHAR(200) )
  PRIMARY AMP INDEX (o_orderkey)
  PARTITION BY (
    COLUMN AUTO COMPRESS ALL BUT (
                     o_ordersubstatus NO AUTO COMPRESS,
                     (o_comment_ext1, o_comment_ext2) NO AUTO COMPRESS,
                     ROW(o_ship_addr, o_bill_addr) ),
  UNIQUE INDEX(o_orderkey);