Banshee.Database.BansheeDbFormatMigrator.Migrate_15 C# (CSharp) Method

        private bool Migrate_15 ()
        {
            string [] columns = new string [] {"Genre", "Composer", "Copyright", "LicenseUri", "Comment"};
            foreach (string column in columns) {
                Execute (String.Format ("UPDATE CoreTracks SET {0} = NULL WHERE {0} IS NOT NULL AND trim({0}) = ''", column));
            }
            return true;
        }