sphinx\Query addWithin()

The columns (and the directions) to find best row within a group. Columns can be specified in either a string (e.g. "id ASC, name DESC") or an array (e.g. ['id' => Query::SORT_ASC, 'name' => Query::SORT_DESC]). The method will automatically quote the column names unless a column contains some parenthesis (which means the column contains a DB expression).

The query object itself