Description:
------------
PHP 7 PDO MySQL with PDO::MYSQL_ATTR_DIRECT_QUERY fetching MySQL DECIMAL type as string type, but expected any type of number type (etc. double).

Tested at Debian sid X64 with latest packages


Test script:
---------------
<?php
declare(strict_types=1);

/*
 
create database `php7` default charset 'utf8';

    use `php7`;

create table `types` (
  `id` int unsigned not null primary key,
  `signed_int` int signed,
  `unsigned_int` int unsigned,
  `signed_float` float signed,
  `unsigned_float` float unsigned,
  `signed_decimal` decimal(10,2) signed,
  `unsigned_decimal` decimal(10,2) unsigned
  );
  
insert into
  `types`
  (`id`, `signed_int`, `unsigned_int`, `signed_float`, `unsigned_float`, `signed_decimal`, `unsigned_decimal`)
values
  ('1', '-30', '44', '-300.33', '334.00033', '-324.34', '64.23')
; 
*/


$dbh = new PDO( "mysql:host=localhost;dbname=php7;unix_socket=/var/run/mysqld/mysqld.sock", "root" );
$dbh->setAttribute(PDO::MYSQL_ATTR_DIRECT_QUERY, false);
$sth = $dbh->prepare("select * from `types`");
$sth->execute();

$row = $sth->fetchObject("stdClass");


print "Type of `id`:" . gettype( $row->id ) . "\n";
print "Type of `signed_int`:" . gettype( $row->signed_int )  . "\n";
print "Type of `unsigned_int`:" . gettype( $row->unsigned_int )  . "\n";
print "Type of `signed_float`:" . gettype( $row->signed_float )  . "\n";
print "Type of `unsigned_float`:" . gettype( $row->unsigned_float )  . "\n";
print "Type of `signed_decimal`:" . gettype( $row->signed_decimal )  . "\n";
print "Type of `unsigned_decimal`:" . gettype( $row->unsigned_decimal )  . "\n";


Expected result:
----------------
Type of `id`:integer
Type of `signed_int`:integer
Type of `unsigned_int`:integer
Type of `signed_float`:double
Type of `unsigned_float`:double
Type of `signed_decimal`:double
Type of `unsigned_decimal`:double

Actual result:
--------------
Type of `id`:integer
Type of `signed_int`:integer
Type of `unsigned_int`:integer
Type of `signed_float`:double
Type of `unsigned_float`:double
Type of `signed_decimal`:string
Type of `unsigned_decimal`:string