Github user koertkuipers commented on the issue:
https://github.com/apache/spark/pull/21273
i would suggest at least that when the quote character is changed that the
empty value should change accordingly. an empty value of ```""``` makes no
sense if the quote character is not ```"```.
also if we could agree on a quote character that means no quotes at all
then i would suggest to change empty value back to null if that particular
quote character is set. because no quoted empty string makes sense if the user
is trying to write out unquoted values.
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