17.05 - Example: Dropping and Adding Partition Ranges - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - SQL Data Definition Language Syntax and Examples

Product
Advanced SQL Engine
Teradata Database
Release Number
17.05
Release Date
January 2021
Content Type
Programming Reference
Publication ID
B035-1144-175K
Language
English (United States)

The following ALTER TABLE request modifies the tables orders and orders_cp created in Table Definitions for Examples. The outcome of the requests are identical to the table alterations performed in later ALTER TABLE requests in this example, but using different syntax.

The request is valid if there are no rows with values for o_orderdate between January 1, 1992 (DATE ‘1992-01-01’) and December 31, 1992 (DATE ‘1992-12-31’).

     ALTER TABLE orders 
     MODIFY
       DROP RANGE BETWEEN DATE '1992-01-01' 
                  AND     DATE '1992-12-31'
       ADD  RANGE BETWEEN  DATE '1999-01-01' 
                  AND      DATE '2000-12-31' 
                  EACH INTERVAL '1' MONTH;

The following request modifies the partitioning for the column-partitioned table orders_cp.

     ALTER TABLE orders_cp 
     MODIFY
       DROP RANGE BETWEEN DATE '1992-01-01' 
                  AND     DATE '1992-12-31'
       ADD  RANGE BETWEEN  DATE '1999-01-01' 
                  AND      DATE '2000-12-31' 
                  EACH INTERVAL '1' MONTH;

The following ALTER TABLE request modifies the table created in Table Definitions for Examples. The result is equivalent to the outcome of other requests in this example set using different syntax, and is valid if there are no rows with values for o_orderdate between January 1 1992 (DATE ‘1992-01-01’) and December 31 1992 (DATE ‘1992-12-31’).

     ALTER TABLE orders 
     MODIFY
       DROP RANGE WHERE PARTITION BETWEEN 1 
                                  AND    12
       ADD RANGE BETWEEN DATE '1999-01-01' 
                 AND     DATE '2000-12-31' 
                 EACH INTERVAL '1' MONTH;

The following request modifies the partitioning for the column-partitioned table orders_cp.

     ALTER TABLE orders_cp 
     MODIFY
       DROP RANGE BETWEEN DATE '1992-01-01' 
                  AND     DATE '1992-12-31'
       ADD  RANGE BETWEEN  DATE '1999-01-01' 
                  AND      DATE '2000-12-31' 
                  EACH INTERVAL '1' MONTH;

The following ALTER TABLE request modifies the table created in Table Definitions for Examples. The result is equivalent to the outcome of other requests in this example set and is valid if there are no rows with values for o_orderdate between January 1 1992 (DATE ‘1992-01-01’) and December 31 1992 (DATE ‘1992-12-31’).

     ALTER TABLE orders 
     MODIFY
       DROP RANGE WHERE Orders.PARTITION IN (1,2,3,4,5,6,7,8,9,10,11,12)
       ADD  RANGE BETWEEN DATE '1999-01-01' 
                  AND     DATE '2000-12-31' 
                  EACH INTERVAL '1' MONTH;

The following request modifies the partitioning for the column-partitioned table orders_cp.

     ALTER TABLE orders_cp 
     MODIFY
       DROP RANGE BETWEEN DATE '1992-01-01' 
                  AND     DATE '1992-12-31'
                  EACH INTERVAL '1' MONTH
       ADD  RANGE BETWEEN  DATE '1999-01-01' 
                  AND      DATE '2000-12-31' 
                  EACH INTERVAL '1' MONTH;