Is it possible to modify the string used to delimit output columns in command line MySQL query results? E.g. could I change
Yes. From mysql documentation:
Thus, you can pipe mysql commandlines output to sed and change tabs to whatever you want.
see sed doc: http://www.grymoire.com/Unix/Sed.html#uh-6
also there seems to be a patch to add that option explicitly: http://bugs.mysql.com/bug.php?id=8904
According to the manual (on linux