$delete_sql = "DELETE FROM $tbl_session_rel_user WHERE id_session = '$session_id' AND id_user ='$user_id' AND relation_type<>".SESSION_RELATION_TYPE_RRHH."";
$delete_sql = "DELETE FROM $tbl_session_rel_user
WHERE id_session = '$session_id' AND
id_user ='$user_id' AND
relation_type <> ".SESSION_RELATION_TYPE_RRHH."";
Database::query($delete_sql);
$return = Database::affected_rows();
// Update number of users
$update_sql = "UPDATE $tbl_session SET nbr_users= nbr_users - $return WHERE id='$session_id' ";
Database::query($update_sql);
$sql = "UPDATE $tbl_session SET nbr_users = nbr_users - $return WHERE id='$session_id' ";
Database::query($sql);
// Get the list of courses related to this session