I would like to know more about the import data and more precisely how the merge data update mode works.
On an environment, I made a first data load using the c3Tools, that worked as expected and could see the data loaded properly when I fetched the results. I then updated a transform expression in one of my transform types and provisioned. I expected to see the new field values resulting from the new transform expression after a new data load but they weren’t changed. The logs (Upload / Process) show no error and when I removed the value myself using a merge and after a new data load I could see the new value.
Is there a diff applied on the new data coming from the data load and the stored one or do we just fill the missing field values with the one coming from the data load?
The environment runs the 7.8 version.