agendav_ynh/sources/web/application/migrations/003_prefs_no_eav.php

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); 

class Migration_Prefs_no_eav extends CI_Migration {
    public function up() {
        // New user preferences table
        echo "Creating table prefs...\n";

        // DBForge doesn't support foreign keys
        if (preg_match('/^mysql/', $this->db->dbdriver)) {
            $sql = <<< 'MYSQL'
                CREATE TABLE prefs (
                        username VARCHAR(255) NOT NULL,
                        options TEXT NOT NULL,
                        PRIMARY KEY(username)
                ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
MYSQL;
        } elseif ($this->db->dbdriver == 'postgre') {
            $sql = <<< 'PGSQL'
                CREATE TABLE prefs (
                        username varchar(255) not null,
                        options text not null,
                        primary key (username));
PGSQL;
        } else {
            echo 'Unsupported database driver!';
            die();
        }

        $this->db->query($sql);

    }

    public function down() {
        $this->dbforge->drop_table('prefs');
    }
}