table,s,a,"",,,"tables to be modified in-place"
oldname,s,a,"",,,"current column name"
newname,s,a,"",,,"new column name, or null"
newfmt,s,a,"",,,"new print format for column, or null"
newunits,s,a,"",,,"new column units, or null"
verbose,b,h,yes,,,"print operations performed?"
mode,s,h,"al"