Surrogate Key Generator In Datastage

1. Surrogate Key And Primary Key
2. Surrogate Key Generation In Datastage
3. Surrogate Key Generator Stage In Datastage With Example
4. Key Generator Download
5. License Key Generator
6. Serial Key Generator
7. Generac Keys

surrogate-key-generation in Transformer

• Answer / murali. Yes ur right but we have another way to generate s key by using transformer.in transformer we have a surrogate key tab click the skey tab in that we hav state file and db sequence.
• In a star schema database, surrogate keys are used to join a fact table to a dimension table. The Surrogate Key Generator stage can have a single input link, a single output link, both an input link and an output link, or no links. Job design depends on the purpose of the stage.
• 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.

Jun 04, 2014  In this post, We will see how to generate surrogate key for data, where we have to use surrogate key stage. A) Design: Below design is a demo design of job. Centos generate ssh public key. Rails generate new secret key base. Here our data source is a row generator which is generating rows. In real time scenario, Source can be a flat file, DB stages, Passive Stage or can be a Active stage also.

Create a unique counter in datastage

This entry describes various ways of creating a unique counter in DataStage jobs.
A parallel job has a surrogate key stage that creates unique IDs, however it is limited in that it does not support conditional code and it may be more efficient to add a counter to an existing transformer rather than add a new stage.
In a server job there are a set of key increment routines installed in the routine SDK samples that offer a more complex counter that remembers values between job executions.
The following section outlines a transformer only technique.

Steps

In a DataStage job the easiest way to create a counter is within the Transformer stage with a Stage Variable.
svMyCounter = svMyCounter + 1
This simple counter adds 1 each time a row is processed.
The counter can be given a seed value by passing a value in as a job parameter and setting the initial value of svMyCounter to that job parameter.

Surrogate Key And Primary Key

In a parallel job this simple counter will create duplicate values on each node as the transformer is split into parallel instances. It can be turned into a unique counter by using special parallel macros.

1. Create a stage variable for the counter, eg. SVCounter.
2. At the Stage Properties form set the Initial Value of the Stage Variable to '@PARTITIONNUM - @NUMPARTITIONS + 1'.
3. Set the derivation of the stage variable to 'svCounter + @NUMPARTITIONS'. You can embed this in an IF statement if it is a conditional counter.

Each instance will start at a different number, eg. -1, -2, -3, -4. When the counter is incremented each instance is increment by the number of partitions, eg. 4. This gives us a sequence in instance 1 of 1, 5, 9, 13.. Instance 2 is 2, 6, 10, 14.. etc.
Remember this method only works if your data is evenly balanced i.e. equal number of rows going through each partition. Alternative syntax is:
@INROWNUM * @NUMPARTITIONS + @PARTITIONNUM
(numpartion*rwonum)+partinnum-numpartition+1
Example:(2 partitions)
2*1+0-2+1=1
2*1+1-2+1=2
2*2+0-2+1=3
2*2+1-2+1=4

Surrogate Key Generation In Datastage

Or
Sequence numbers can be generated in Datastage using certain routines. They are

Surrogate Key Generator Stage In Datastage With Example

-KeyMgtGetNextVal

Key Generator Download

-KeyMgtGetNextValConn

License Key Generator

Serial Key Generator

Or

NextSurrogatekey()

Generac Keys