Description:
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PDO doesn't throw an exception when occurs mysql error 1690:bigint unsigned value is out of range，just return an empty array 

Test script:
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# CREATE TABLE  `test` (`id` int(10) unsigned DEFAULT NULL, `pv` int(10) unsigned DEFAULT NULL,`yesterday_pv` int(10) unsigned DEFAULT NULL) ENGINE=InnoDB DEFAULT CHARSET=utf8

#insert into test set id=1,pv=1,yesterday_pv=2;
<?php
$dbh = new PDO("mysql:host=localhost;port=3306;dbname=testdb","root");
$sth = $dbh->prepare('select id,pv-yesterday_pv from test');
$sth->execute();
$result = $sth->fetchAll();
var_dump($result);

Expected result:
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throw a PDOException

Actual result:
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array(0) {
}