ANALYZE UPDATE does not populate r_rows

MariaDB [test]> create table t1 (i int);

Query OK, 0 rows affected (0.66 sec)

MariaDB [test]> insert into t1 values (1),(2),(3),(4);

Query OK, 4 rows affected (0.08 sec)

Records: 4  Duplicates: 0  Warnings: 0

MariaDB [test]> flush status;

Query OK, 0 rows affected (0.00 sec)

MariaDB [test]> analyze update t1 set i=8;

+------+-------------+-------+------+---------------+------+---------+------+------+--------+----------+------------+-------+

| id   | select_type | table | type | possible_keys | key  | key_len | ref  | rows | r_rows | filtered | r_filtered | Extra |

+------+-------------+-------+------+---------------+------+---------+------+------+--------+----------+------------+-------+

|    1 | SIMPLE      | t1    | ALL  | NULL          | NULL | NULL    | NULL |    4 |   NULL |   100.00 |     100.00 |       |

+------+-------------+-------+------+---------------+------+---------+------+------+--------+----------+------------+-------+

1 row in set (0.08 sec)

MariaDB [test]> show status like 'Handler_read%';

+--------------------------+-------+

| Variable_name            | Value |

+--------------------------+-------+

| Handler_read_first       | 0     |

| Handler_read_key         | 0     |

| Handler_read_last        | 0     |

| Handler_read_next        | 0     |

| Handler_read_prev        | 0     |

| Handler_read_rnd         | 0     |

| Handler_read_rnd_deleted | 0     |

| Handler_read_rnd_next    | 5     |

+--------------------------+-------+

8 rows in set (0.00 sec)

Branch: 10.1

commit 12d6f89b073351169e070355e8db363d0d649749

Author: Sergei Petrunia <psergey@askmonty.org>

Date:   Thu Jun 26 15:55:25 2014 +0400