I'm talking about updating it from the Server Behavior, not in the code.
If that is the column you want the image name saved into and you want to do it in the code, then the line would be:
$UpdateQuery->bindColumn("icon", "s", "".($WA_DFP_UploadStatus["WA_UploadResult1"]["WA_UploadResult1_1"]["serverFileName"]) ."", "WA_DEFAULT");