Hi. I've incorporated the changes you sent me off-list. The attached v1 no-cfbot is your proposed change. I also did some minor comments adjustments.
The remaining patches continue to work for me. I hope we can get all of this into 19, but if we can't I think it would be ok to limit src/dest type combinations to those that can be handled by CoerceViaIO, at least for 19. I think the vast majority of the usage of this function will be mass ETLs where data is first loaded into a table of all text.
