错误：尝试返回insert_id时，此功能对于您使用的数据库不可用

I have function in my codeigniter model returning the function insert_id() I am using Oracle11g, Does anyone know how to return the last inserted record in codeigniter using Oracle DB Here is an example of what I will like to do

public function test_insert($data)
{
  $this->db->insert('PERFORMANCE', $data);
      return $this->db->insert_id();
}

Your help will be well appreciated. Thank you.

Well, this the insert_id() feature is not available for Oracle11g. You can refer to the answer here, for the alternative.