sqlmap 0.8-rc4: --dump option now can also accept only -C: user can provide a string column and sqlmap will enumerate all databases, tables and columns that contain the 'provided_string' or '%provided_string%' then ask the user to dump the entries of only those columns.

--columns now accepts also -C option: user can provide a string column and sqlmap will enumerate all columns of a specific table like '%provided_string%'.
Minor enhancements.
Minor bug fixes.