function my_custom_action(){
    $myinput = $_POST['address'];

    global $wpdb;
    $table_name = 'wp44_predefined_address';
    $result = $wpdb->get_row("SELECT * FROM wp44_predefined_address WHERE 'UPPER(Address1)' LIKE 'UPPER(%s)'", $myinput);
    print_r ($result);
die();
}