Codeigniter上的SQL查询限制和偏移量错误

Question

Error Number: 1064

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''3'' at line 1

SELECT * FROM tbl_testimoni order by id DESC limit 3 offset '3'

Filename: D:\\wamp\\www\\obatrohanifinalcopy\\system\\database\\DB_driver.php

Line Number: 330

Hello, I'm having problem with my query syntax. I think the problem is in limit and offset query. Because I have tried without limit and offset and my script can work properly. But the pagination function doesn't work according to my wish.

This is my controller:

$url=$this->uri->segment(3,0);
        $this->load->library('pagination');
        $config['base_url'] = site_url().'/testimonial/all/';
        $config['total_rows'] = $this->db->get('tbl_testimoni')->num_rows();
        $config['per_page'] = 3;
        $this->pagination->initialize($config);
        $data['page']=$this->pagination->create_links();

        $sql = " SELECT * FROM tbl_testimoni order by id DESC limit 3 offset ? ";
        $binds = array($url);
        $query = $this->db->query($sql, $binds);
        $artikel = $query->result_array();
        $data['action'] = 'testimonial/all';
        $data['artikel'] = $artikel;
        $data['content'] = 'content/testimoni';
        $this->load->view('template/default', $data);

and in my view the pagination was called using this code:

<?php if(!empty($page)) echo $page; ?>

and my code doesn't work properly.

Note: I was using this controller and view in my previous website but there I was using PostgreSQL and it worked.

Answer 1

Try typecasting the $binds variable as in $this->db->query($sql, intval($binds));

Also, by the documentation $this->uri->segment() may return boolean, so you might want to handle that as well.

Answer 2

The offset should be a number not string '3'

when you pass the $binds in $this->db->query($sql, $binds); the DB Driver think its a value and replace your ? with '3' where it should be OFFSET 3