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I have a large workflow that combines multiple disparate data sources using an union tool. After the union, I join the union result with a date master table to get all the data on the same shipping day schedule. The workflow worked great using the original engine but after upgrading to 2020.4 and enabling the AMP engine, I am getting weird results. I've posted a sample image of the output in Tableau below.
The result should show shipping day 1 as it's all the data for the 1st of the month but as you can see it shows varying results.
Any thoughts, insight and or feedback would be greatly appreciated.
Because AMP distributes processing to multiple threads, and then brings the data back together, it may not be in the same order as when using non-AMP. The data set that results should be the same, meaning you shouldn't be losing or gaining any records using AMP vs. non-AMP. Nor should the values of your fields be different. The order of those records, however, will be different.
Are you saying that you're losing (or gaining) records? Are the values different? Or is it just the order?
I'm having a similar issue using a simple Summarize. While I can add a sorting tool after, it is pretty annoying that the system cannot do it by itself. For some processes, adding a sorting tool after each summary would greatly undo the time-savings of using the AMP engine. I hope they add a feature to the Summarize tool with AMP engine that automatically sorts results the same way the non-AMP engine would be.