I have 2 database fields

`decval` decimal(5,2)
`intval` int(3)

I have 2 pdo queries that update them. The one that updates the int works ok

$update_intval->bindParam(':intval', $intval, PDO::PARAM_INT);

but I can't update the decimal field. I've tried the 3 ways below, but nothing works

$update_decval->bindParam(':decval', $decval, PDO::PARAM_STR);
$update_decval->bindParam(':decval', $decval, PDO::PARAM_INT);
$update_decval->bindParam(':decval', $decval);

It seems the problem is with the database type decimal? Is there a PDO::PARAM for a field of type decimal? If not, what do I use as a workaround?