I have a load script that imports various CSVs and QVDs. One of the fields, ObservationValue, contains a mix of text, dates and numbers. Depending on the order that the files are loaded in, some of the dates get converted to integers, but I want them to stay in their original date format. I would rather not force the field to be Text. Is there any other way to guarantee that all values will appear exactly as they were in the source files?