MariaDB [cs0275577]> explain SELECT d.id, d.dname, c.id, c.cname, c.state FROM deployment d join host c on d.id=c.deployment_id order by c.id limit 1;

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

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

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

|    1 | SIMPLE      | d     | ALL  | PRIMARY               | NULL                  | NULL    | NULL           | 97470 | Using temporary; Using filesort |

|    1 | SIMPLE      | c     | ref  | cluster_fk_deployment | cluster_fk_deployment | 767     | cs0275577.d.id | 6     |                                 |

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

2 rows in set (0.001 sec)

MariaDB [cs0275577]> explain SELECT d.id, d.dname, c.id, c.cname, c.state FROM host c straight_join deployment d on d.id=c.deployment_id order by c.id limit 1;

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

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

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

|    1 | SIMPLE      | c     | index  | cluster_fk_deployment | PRIMARY | 767     | NULL                      | 1    |       |

|    1 | SIMPLE      | d     | eq_ref | PRIMARY               | PRIMARY | 767     | cs0275577.c.deployment_id | 1    |       |

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

2 rows in set (0.000 sec)

MariaDB [cs0275577]> SELECT d.id, d.dname, c.id, c.cname, c.state FROM deployment d join host c on d.id=c.deployment_id order by c.id limit 1;

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

| id                                   | dname      | id                                   | cname      | state   |

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

| 4f8cc10b-83ca-41d3-b5b4-9cc74e1292da | depl-73221 | 00000122-e6b5-499d-993f-8052a9272cf3 | cluster-14 | RUNNING |

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

1 row in set (25.254 sec)

MariaDB [cs0275577]> SELECT d.id, d.dname, c.id, c.cname, c.state FROM host c straight_join deployment d on d.id=c.deployment_id order by c.id limit 1;

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

| id                                   | dname      | id                                   | cname      | state   |

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

| 4f8cc10b-83ca-41d3-b5b4-9cc74e1292da | depl-73221 | 00000122-e6b5-499d-993f-8052a9272cf3 | cluster-14 | RUNNING |

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

1 row in set (0.002 sec)