php - Zend DB - Max Time does not return the latest time -

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i have follow table value timestamp.

[ttimestamp] column 2013-07-11 11:52:19 2013-07-11 11:52:23 2013-07-11 11:52:27

however, instead of return latest time following query, returns smallest... why?

$select = $this->dbo->select(array("max(ttimestamp)"))     ->from(array('t' => 'table'));

there has been bug report http://bugs.mysql.com/bug.php?id=54784. not sure version running. should work if max(unix_timestamp(ttimestamp))


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