Lead Function in Rank and Window Returning Self Referencing Value

Sam_Y
Sam_Y Member
in Magic ETL

For some reason I am getting a self referencing value rather than a NULL. In this example, I was expecting the Next Row Column to be NULL for the last row. Instead, it seems to be self referencing the student enrollment # column. The first 5 rows in the example are correct. Is this the default behavior of this function/tile when an offset is not returned?

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  • Sam_Y
    Sam_Y Member

    Additional Information: When I filter the data flow down to a single Student Index, the function works fine. When I remove the filter to include all rows, the function presents itself as shared above

  • ST_-Superman-_
    ST_-Superman-_ Coach

    Just to clarify, but is StudentIndex always populated and is it unique for each partition?


    “There is a superhero in all of us, we just need the courage to put on the cape.” -Superman
  • Sam_Y
    Sam_Y Member

    @ST_-Superman-_ To answer your question yes and yes. I think I found the issue. I have a Rank function earlier in the data flow that uses End Date to rank the rows in the partition. In this example, there were two rows with the same End Date so it ranked them both Student Enrollment # 6.

  • Sam_Y
    Sam_Y Member

    @ST_-Superman-_ Also - thanks for responding!!!

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