MariaDB [test]> set infinidb_vtable_mode=0;

Query OK, 0 rows affected (0.00 sec)

MariaDB [test]> explain extended select sum(i) from cs3 group by it having it < (select sum(it) * 5 from cs3);

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

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

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

|    1 | PRIMARY     | NULL  | NULL | NULL          | NULL | NULL    | NULL | NULL |     NULL | Storage engine handles GROUP BY |

|    2 | SUBQUERY    | NULL  | NULL | NULL          | NULL | NULL    | NULL | NULL |     NULL | Storage engine handles GROUP BY |

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

2 rows in set, 1 warning (0.00 sec)

MariaDB [test]> select sum(i) from cs3 group by it having it < (select sum(it) * 5 from cs3);

ERROR 2013 (HY000): Lost connection to MySQL server during query

MariaDB [test]> select * from cs3;

ERROR 2006 (HY000): MySQL server has gone away

No connection. Trying to reconnect...

Connection id:    9

Current database: test

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

| i    | it   |

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

|    5 |    5 |

|    6 |    3 |

|   25 |   32 |

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

3 rows in set (0.08 sec)