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[CLOSED] DB_LOOKUP
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VS4
Member
posted
Hi,
I am using DB_LOOKUP to load my fact table from SCD dimensions , so when I look up into my dimension table I need to retrieve the latest record for that dimension (where SCD end date is null), how can I incorporate that rule while using DB_LOOKUP ?

For example I am doing DB_LOOKUP on JOBID to retrieve job_guid(surrogate key)to load my Fact table from my junk dimension d_umms_job_detail. in that dimension i will have several rows for that jobid but i need to retrieve the guid for the most recent record (where enddate is null)

DB_LOOKUP(d_umms_job_detail, JOBID, JOB_ID, UMMS_JOB_DET_GUID)

thanks for your help.

Regards
VS4

This message has been edited. Last edited by: Tamra,


WebFOCUS8,IWAY DM
Windows, All Outputs
 
Posts: 9 | Registered: July 29, 2014Report This Post
Clif
Guru
posted Hide Post
That's the problem with NULL. You can't look for it.

Although the default value for the end date for active records is NULL (it seemed like a good idea at the time) you can override it by setting a value for the SCD variable &&CM__SCDEADT as a date far in the future, say 29991231 in the Variables object in the process flow. Then create a source transformation for a field with that value. Now you can use that as an additional field in your DB_LOOKUP.

Alternatively you could add an Active Flag to your dimension table. Then create a transformation for a field with value 1, and use that as the additional field in your DB_LOOKUP.


N/A
 
Posts: 397 | Location: New York City | Registered: May 03, 2007Report This Post
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