Which release off incorta are you using? The question mark may work in pyspark as well but the last refresh time fuction was the equivalent to question mark. You will need to pass the value to the filter as shown in the example using % to replace it.
Another way is to use the max value in a separate query and use that query to filter the data.
In a more recent release, the max value will be available from incorta loader using the ? replacement and you don't need to get the value by yourselves.
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