Description:
------------
We are trying to prepare and execute a XQuery statement but PDO is parsing the statement incorrectly when passed to pdo_parse_params.  The following XQuery:

XQUERY declare default element namespace "http://posample.org"; for $custinfo in db2-fn:xmlcolumn('CUSTOMER.INFO') /customerinfo[addr/@country="Canada"] order by $custinfo/name return $custinfo

is getting parsed incorrectly to the following statement:

XQUERY declare default element namespace "http://posample.org"; for $custinfo in db2-fn?('CUSTOMER.INFO') /customerinfo[addr/@country="Canada"] order by $custinfo/name return $custinfo



Reproduce code:
---------------
<?php
$pcom = new PDO("ibm:SAMPLE", "", "");

$query = "XQUERY declare default element namespace \"http://posample.org\"; for \$custinfo in db2-fn:xmlcolumn('CUSTOMER.INFO') /customerinfo[addr/@country=\"Canada\"] order by \$custinfo/name return \$custinfo";


$stmt = $pcom->prepare($query);

try {
  $stmt->execute();
} catch(exception $e) {
  echo "Issue\n";
}
?>


Expected result:
----------------
Row output from the execute that is populated in the db2sampl database.

Actual result:
--------------
Fatal error: Call to a member function execute() on a non-object in /home/pd/kfbombar/nacon/work/php/PDO_IBM-1.1.0/now.php on line 10