Method get_num_columns

dlib/sqlite/sqlite.h:210–221

        }

        unsigned long get_num_columns(
        ) const
        {
            if( (at_first_step==false) && (step_status==SQLITE_ROW))
            {
                return sqlite3_column_count(stmt);
            }
            else
            {
                return 0;
            }
        }

        const std::string& get_sql_string (
        ) const