$sql = 'SELECT COUNT(topic_id) AS num_topics

		FROM ' . TOPICS_TABLE . "

		WHERE forum_id = $forum_id

			AND (topic_last_post_time >= $min_post_time

				OR topic_type = " . POST_ANNOUNCE . '

				OR topic_type = ' . POST_GLOBAL . ')

			AND ' . $phpbb_content_visibility->get_visibility_sql('topic', $forum_id);

	$result = $db->sql_query($sql);

	$sql_ary = array(

		'SELECT'	=> 'COUNT(t.topic_id) AS num_topics',

		'FROM'		=> array(

			TOPICS_TABLE	=> 't',

		),

		'WHERE'		=> 't.forum_id = ' . $forum_id . '

			AND (t.topic_last_post_time >= ' . $min_post_time . '

				OR t.topic_type = ' . POST_ANNOUNCE . '

				OR t.topic_type = ' . POST_GLOBAL . ')

			AND ' . $phpbb_content_visibility->get_visibility_sql('topic', $forum_id),

	);

	/**

	* Modify the sort data SQL query for getting additional fields if needed

	*

	* @event core.viewforum_modify_sort_data_sql

	* @var	array	sql_ary			The SQL array

	* @since 3.1.6-RC1

	*/

	$vars = array('sql_ary');

	extract($phpbb_dispatcher->trigger_event('core.viewforum_modify_sort_data_sql', compact($vars)));

	$result = $db->sql_query($db->sql_build_query('SELECT', $sql_ary));