Description:
------------
Although setFetchMode() is properly documented as returning bool:
http://php.net/manual/en/pdostatement.setfetchmode.php

The documentation says on the same page:
"Returns 1 on success or FALSE on failure."

The sample code below confirms that it's always returning a boolean, not an 
integer.
The documentation should then be changed to:
"Returns TRUE on success or FALSE on failure."

Test script:
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$pdo = new PDO('sqlite::memory:');
$st = $pdo->query('SELECT * FROM sqlite_master');
var_export($st->setFetchMode(PDO::FETCH_NUM));