Codeigniter中的SQL LIKE运算符

Question

If have this tables

USER TABLE
ID  | name  | mode
1   |  foo  | private

PRIVATE TABLE
private_id  | id |  private_name
1           | 1  |  private mode

PUBLIC TABLE
public_id   | id |  public_name
1           | 1  |  public mode

I want to return the query depending what data in school for example if the data of COLUMN MODE in USER TABLE is private I want it to search only in PRIVATE TABLE and if its public it only returns the data in PUBLIC TABLE

this is my code

if($search){
$search_str = '(user.name LIKE '%{$search}%'
                OR private.private_name LIKE '%{$search}%'
                OR public.public_name LIKE '%{search}%'
                )';
    $this->db->where($search_str,NULL,FALSE);

    $this->db->join("private","private.id = user.id","LEFT");
    $this->db->join("public","public.id = user.id","LEFT");
}

if my keyword is mode in search box it returns the private mode and public mode

Answer 1

$search_str = '(user.name LIKE '%{$search}%'
                OR (private.private_name LIKE '%{$search}%' AND user.mode = 'private')
                OR (public.public_name LIKE '%{search}%' AND user.mode = 'public')
                )';

In this line OR (private.private_name LIKE '%{$search}%' AND user.mode = 'private') it will check the data in MODE COLUMN in USER TABLE if its equal to private and then proceed to PRIVATE TABLE to find the specified pattern of a keyword in a PRIVATE NAME COLUMN .

And in this line OR (public.public_name LIKE '%{$search}%' AND user.mode = 'public') it will check the data in MODE COLUMN in USER TABLE if its equal to public and then proceed to PUBLIC TABLE to find the specified pattern of a keyword in a PUBLIC NAME COLUMN .