Description:
------------
We're trying to use PDO to connect to a Vertica database and it works as long as we don't put parameters in our queries. For example, a simple query like this works no problem:

$stmt = $conn->prepare("Select Name from clients where ClientNum = 123");

However, when I do it like this, I get a blank page:

$stmt = $conn->prepare("Select Name from clients where ClientNum = :cl");
$stmt->bindValue(":cl", 123);



Test script:
---------------
$c = new PDO("odbc:Driver=Vertica;Server=X.X.X.X;Port=5433;Database=db;", "myUser", "myPassword");

$stmt = $c->prepare("SELECT ClientName FROM tblClients where ClientNum = :cl");
$stmt->bindValue(":cl", 123);
$stmt->execute();
	
while($res = $stmt->fetch(PDO::FETCH_ASSOC))
{
	echo $res['ClientName'] . "<br>";
}

Expected result:
----------------
I expect the name of the client to get displayed

Actual result:
--------------
A blank page