Description:
------------
I get an error when trying to execute an SQL with an DATETIME constructor:

select DATETIME (00:00) HOUR TO MINUTE from test

This equal SQL works perfectly on SQL EDITOR (informix).


Reproduce code:
---------------
<?php
try
{
print "connecting \n";
$db = new PDO($PDOTEST_DSN, $PDO_USER, $PDO_PASSWD);

}
catch (PDOException $e)
{
echo 'Error message: ' . $e->getMessage();
exit;
}
$db->exec("create table test (fechaid serial not null,fecha datetime year to second,text CHAR(50),primary key (fechaid))");
$db->exec("
insert into test VALUES (0,'2008-03-05 00:00:00','text one');
insert into test VALUES (0,'2008-03-05 00:00:10','text two');
insert into test VALUES (0,'2008-03-05 00:05:02','text three');");
$db->query("select DATETIME (00:00) HOUR TO MINUTE from test");
var_dump($db->errorinfo());
?>


Expected result:
----------------
connecting
array(3) {
  [0]=>
  string(5) "00000"
  [1]=>
  int(0)
  [2]=>
  string(24) " ((null)[0] at (null):0)"
}


Actual result:
--------------
connecting
array(3) {
  [0]=>
  string(5) "42000"
  [1]=>
  int(-201)
  [2]=>
  string(158) "[Informix][Informix ODBC Driver][Informix]A syntax error has occurred. (SQLPrepare[4294967095] at /tmp/pear/download/PDO_INFORMIX-1.1.0/informix_driver.c:131)"
}