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surrogate key
What is the Disadvantage of surrogate key stage?


  
Total Answers and Comments: 2 Last Update: July 22, 2008     Asked by: Suri123 
  
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July 20, 2008 23:52:15   #1  
debojyoti_datastage Member Since: July 2008   Contribution: 0    
RE: surrogate key
The main disadvantage of this stage comes when you use it second time around..

There you have to give the initial value of the surrogate key....

I faced the similar situation and the only way i found was to write a unix shell script which would give me max value of the surrogate key column.

Increase it by 1 in the script and run the job passing that value as the paramater...
which would be used as the initial value
 
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July 22, 2008 15:01:21   #2  
rajul.ds Member Since: July 2008   Contribution: 0    
RE: surrogate key
to my concern if the data is not properly processed on nodes..in such suitations this surrogate key generates holes(simply skips the ordering )
ex:
aa-1
bb-2
ba..
bg...
cc-3
dd-4
ddd-5
here for ba and bg do not have seq key ,here ba and bg have holes

 
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 Related Questions

Surrogate Key is a Primary Key for a Dimension table. Most importance of using it is it is independent of underlying database. i.e Surrogate Key is not affected by the changes going on with a database.  
Latest Answer : surrogate key is nothing but a primary key,it gives a serial no. to all records.surrogate key is act's as a major role in type 2 scenario.if u have any updates to be applied on a database it will be directely effected on datawarehouse part(using surrogate ...
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Latest Answer : You can also generate the surrogate key in the database using the sequence generator. ...
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Latest Answer : the Surrogate key will be the key field in the dimensions. ...
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Latest Answer : Surrogate key generator is available only in Parralle edition in Server mode you will have  to use stage variables or pre-defined variables like @inrownum, @outrownum ...
What is the Disadvantage of surrogate key stage? 
Latest Answer : to my concern if the data is not properly processed on nodes..in such suitations this surrogate key generates holes(simply skips the ordering )ex:aa-1bb-2ba..bg...cc-3dd-4ddd-5here for ba and bg do not have seq key ,here ba and bg have holes ...
Read Answers (2) | Asked by : Suri123

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