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More options for field separators & control character support

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Many text files use field separators that are not currently supported in Tableau Prep.  While the "Other" option is nice, it only supports entering a single character.  What if, for example, my input file uses double-pipe (||) to separate fields?  What if it does this because a single pipe could appear within the contents of a single field?  Also not supported are control characters (non-printable ASCII characters) which do come up from time-to-time.



I'd love to see the text file input options become more robust in future versions.


See this thread for a real-world use case: Ctrl-A delimiter







P.S. the REPLACE() function, which might have been a viable workaround, seemed to choke on control characters when I tried something like REPLACE([field], CHAR(1), "|")


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