Bp_Search_Activity_Comment::sql( $search_term,  $only_totalrow_count = false )

		function sql( $search_term, $only_totalrow_count=false ){

			/**
			 * SELECT DISTINCT a.id
			 * FROM wp_bp_activity a
			 * WHERE
			 *		a.is_spam = 0
			 *	AND a.content LIKE '%nothing%'
			 *  AND a.hide_sitewide = 0
			 *  AND a.type NOT IN ('activity_comment', 'last_activity')
			 *
			 * ORDER BY a.date_recorded DESC LIMIT 0, 21
			 */
			global $wpdb, $bp;

			$query_placeholder = array();

			$sql = " SELECT ";

			if( $only_totalrow_count ){
				$sql .= " COUNT( DISTINCT id ) ";
			} else {
				$sql .= " DISTINCT a.id , 'activity_comment' as type, a.content LIKE %s AS relevance, a.date_recorded as entry_date  ";
				$query_placeholder[] = '%'.$wpdb->esc_like( $search_term ).'%';
			}

			//searching only activity updates, others don't make sense
			$sql .= " FROM 
						{$bp->activity->table_name} a 
					WHERE 
						1=1 
						AND is_spam = 0 
						AND a.content LIKE %s 
						AND a.hide_sitewide = 0 
						AND a.type = 'activity_comment'
				";
			$query_placeholder[] = '%'.$wpdb->esc_like( $search_term ).'%';
			$sql = $wpdb->prepare( $sql, $query_placeholder );

            return apply_filters(
                'Bp_Search_Activity_Comment_sql',
                $sql,
                array(
                    'search_term'           => $search_term,
                    'only_totalrow_count'   => $only_totalrow_count,
                )
            );
		}