function getTopicsEmailsCount($topics_ids, $unique = true)
{
global $application;
if (empty($topics_ids)) {
return array();
}
$tables = $this->getTables();
$etable = 'subscription_email';
$ecolumns =& $tables[$etable]['columns'];
$query = new DB_Select($etable);
if ($unique) {
$query->addSelectField(DB_Select::fCountDistinct($ecolumns['email_id']), 'email_count');
} else {
$query->addSelectField(DB_Select::fCount($ecolumns['email_id']), 'email_count');
}
$query->Where($ecolumns['topic_id'], DB_IN, DBQuery::arrayToIn($topics_ids));
$res = $application->db->getDB_Result($query);
return $res[0]['email_count'];
}