wpdb::get_col_info PHP Method

    public function get_col_info($info_type = 'name', $col_offset = -1)
    {
        $this->load_col_info();
        if ($this->col_info) {
            if ($col_offset == -1) {
                $i = 0;
                $new_array = [];
                foreach ((array) $this->col_info as $col) {
                    $new_array[$i] = $col->{$info_type};
                    $i++;
                }
                return $new_array;
            } else {
                return $this->col_info[$col_offset]->{$info_type};
            }
        }
    }

 } else {
     //Page navigation
     $pagination = new pagination();
     $pagination->set_pagination_tpl_path($wpbi_url['tpl']);
     $pagination->set_pg_interval($wpbi_settings['parameter']['page-interval']);
     $pagination->set_pg_parameter('paged');
     $pagination->set_current_page(isset($_GET[$pagination->pg_parameter]) ? abs((int) $_GET[$pagination->pg_parameter]) : 1);
     $pagination->set_rows($total_rows);
     $pagination->set_css_class('widefat');
     $pagination->set_pagination_stats($wpbi_dialog['table']['pagination']['stats']);
     $pagination->set_paginate_links(paginate_links(array('base' => esc_url(add_query_arg($pagination->pg_parameter, '%#%')), 'format' => '', 'prev_text' => $wpbi_dialog['table']['pagination']['prev_text'], 'next_text' => $wpbi_dialog['table']['pagination']['next_text'], 'total' => ceil($pagination->rows / $pagination->pg_interval), 'current' => $pagination->current_page)));
     $pagination->initialize();
     //END page navigation
     //Execute query limitng the resultset
     $my_test_rows = $my_test_db->get_results($query->limit_qy_to($pagination->item_start - 1, $pagination->pg_interval), 'ARRAY_N');
     $my_test_cols = $my_test_db->get_col_info('name');
     //Output table
     $table = new table();
     $table->set_table_tpl_path($wpbi_url['tpl']);
     $table->set_table_pagination($pagination->get_html());
     $table->set_css_class('widefat');
     $table->set_rows($my_test_rows);
     $table->set_cols($my_test_cols);
     $table->has_header(true);
     $table->has_footer(true);
     $table->encode_html(true);
     $test_output = $test_output . $table->get_html();
 }
 //Prepare output
 $template_site->assign_vars(array('PG_TITLE' => $wpbi_dialog['page']['queries']['title'], 'PG_DESCRIPTION' => sprintf($wpbi_dialog['query']['saved']['test'], $vo_query->name, htmlentities($query->stmt))));
 $template_site->pparse('header');