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  • If an input value is missing or null, it is not factored in the computation. For example, for the first row in the dataset, the rolling minimum of previous values is undefined.
  • The row from which to extract a value is determined by the order in which the rows are organized based on the order parameter. 

  • If you are working on a randomly generated sample of your dataset, the values that you see for this function might not correspond to the values that are generated on the full dataset during job execution.

  • The function takes a column name and two optional integer parameters that determine the window backward and forward of the current row.
    • The default integer parameter values are -1 and 0, which computes the rolling function from the current row back to the first row of the dataset.
  • This function works with the following transforms:
  • Window Transform
  • Set Transform
  • Derive TransformWindow transform. See Window Transform.

For more information on a non-rolling version of this function, see MIN Function.

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