Surrogate Key Generator In Datastage

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Surrogate Key Generator Implementation in Datastage 8.1, 8.5 and 9.1 The Surrogate Key Generator stage is a processing stage that generates surrogate key columns and maintains the key source. A surrogate key is a unique primary key that is not derived from the data that it represents, therefore changes to the data will not change the primary key. Jan 16, 2012 The Surrogate Key Generator stage is a processing stage that generates surrogate key columns and maintains the key source. A surrogate key is a unique primary key that is not derived from the data that it represents, therefore changes to the data will not change the primary key. Display fusion license key generator. In a star schema database, surrogate keys.

  1. Surrogate Key Generator In Datastage Windows 10
  2. Surrogate Key Generator In Datastage 1

The right answer is that with SQL Server we don't really need a Sequence Generator or State File or a database sequence, we just need to add to the table the IDENTITY column which will auto increment for every record inserted. And to use that with the SCD stage just let the Surrogate Key option blank.


When using the Surrogate Key Generator Stage with Database Sequence, please note that before using the sequence values:
Key
1. The 'Sequence' needs to be created in the database in order to use it. Sequence creation script:

Surrogate Key Generator In Datastage Windows 10

CREATE SEQUENCE Sequence_Name INCREMENT BY 1 START WITH 1 NOMAXVALUE CACHE 10;
2. For a Database sequence, note here to use appropriate action with respect to the following:

Surrogate Key Generator In Datastage 1

CYCLE:
Specify CYCLE to indicate that the sequence continues to generate values after reaching either its maximum or minimum value. After an ascending sequence reaches its maximum value, it generates its minimum value. After a descending sequence reaches its minimum, it generates its maximum value.
Specify NOCYCLE to indicate that the sequence cannot generate more values after reaching its maximum or minimum value. This is the default.
3. Test the Sequence on the database server side with script:
4. Create sequence environmental variable on DataStage server side, to make the stage/job reusable
5. Use the following in the Surrogate Key Generator Stage:
Source Name =#db_server#.#db_name#.#schema#.<sequence_name>
The source name here should not be the<table_name> but the oracle sequence name, which we had created in the above steps.
6. Alternatively, In the Target DB Stage you can when simplyinserting into your target table, use <sequence name>.nextvalin your insert statement.
Thanks!