The POD docs of DBD::Chart listed on CPAN are bad (really bad - to the point of misleading) but then again it is listed as BETA. You'll notice that the example doesn't even load the module let alone use it. Nor does it list any methods/functions.

But also stated in the POD doc is the link on what to do with DBD::Chart. There you will find that you don't have to create a new table.