In our docs we say this:
Because these common transforms do not offer the ability to output an error instead of the original cell contents, be careful to look for unconverted and untransformed values. You will see a yellow alert at the top of screen that will tell you how many cells were converted - if this number does not match your current row set, you will need to look for and manually correct the remaining cells. Also consider faceting by data type, with the GREL function
type().
Having just a casual banner notification is not enough here. I think users expect more because there is too much of a cognitive effort here with larger datasets.
So, it would be convenient I think to have a Facet that can show "Transformed": true/false in order to know which cells in the column were last transformed successfully or not.
Good New Issue?