Set database schema in CodeIgniter for Oracle

Question

I'm trying to learn CodeIgniter and just getting my hands dirty with the model component of the MVC architecture.

I first tried using the query builder but found that it keeps adding quotes to my table/column names. A way to fix that is to use all caps on them and that fixed it. I hate writing in all caps though so I decided to just not use the query builder and do $this->db->query(); instead.

The issue I have with this right now is that I have to constantly write the schema with the table name: SELECT * FROM schema.table_name. I would like to avoid having to write schema. for all tables I need to reference.

I browsed the documentation and saw a configuration for setting schemas however it seems like it's only used with PostgreSQL and ODBC drivers. I still tried it but of course it didn't work as I expected. I still get an error saying the table could not be found.

NOTES:

I am logged in as my user but I need to run queries as a different user - i.e. logged in as user1 but need to run queries as user2.table_name.

@ schema: documentation of CI 3.0 says: The database schema, defaults to ‘public’. Used by PostgreSQL and ODBC drivers. — Vickel
– Vickel, Commented Aug 30, 2018 at 23:06
@Vickel I already solved the problem with quotes by doing $db['default']['_protect_identifiers'] = false;. Do you know of a way to avoid needing to constantly supply the schema? — dokgu
– dokgu, Commented Aug 31, 2018 at 17:45

dokgu · Accepted Answer · 2018-08-31 18:03:34Z

2

So I was able to solve this by adding a __construct() on my model class.

class My_model extends CI_Model {
  public function __construct() {
    $this->db->query("ALTER SESSION SET CURRENT_SCHEMA = my_schema");
  }

  public function get_awesome_user() {
    $this->db->select("u.username, u.firstname, u.lastname");
    $this->db->from("sys_users u");
    $this->db->where("u.username", $this->input->post("username"));

    $query = $this->db->get();
    return $query->result();
  }
}

answered Aug 31, 2018 at 18:03

dokgu

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