resources.db.adapter = "pdo_ibm"
resources.db.params.host = "xxx"
resources.db.params.port = "yyy"
resources.db.params.username = "xxx"
resources.db.params.password = "yyy"
resources.db.params.dbname = "dbname"
resources.db.params.charset = "utf8"
resources.db.isDefaultTableAdapter = true

class Application_Model_DbTable_StoUsers extends Zend_Db_Table_Abstract
{
    protected $_name    = 'sto_users';
    protected $_primary = 'id';
}

$dbtUser = new Application_Model_DbTable_StoUsers();


echo $dbtUser->select();

=>

SELECT "sto_users".* FROM "sto_users"

=>

SQLSTATE[42000]: Syntax error or access violation: -201 [IBM][CLI Driver][IDS/UNIX32] A syntax error has occurred. (SQLNumResultCols[-201] at /usr/local/src/PDO_IBM-1.3.2/ibm_driver.c:153)