Cascade on delete constraints

[c-bata]

close #38.

[c-bata]

MySQL

mysql> show tables;
+-------------------------+
| Tables_in_goptuna       |
+-------------------------+
| studies                 |
| study_system_attributes |
| study_user_attributes   |
| trial_params            |
| trial_system_attributes |
| trial_user_attributes   |
| trial_values            |
| trials                  |
+-------------------------+
8 rows in set (0.01 sec)

mysql> seelect * from studies;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'seelect * from studies' at line 1
mysql> select * from studies;
+----------+------------+-----------+
| study_id | study_name | direction |
+----------+------------+-----------+
|        1 | rdb        | MINIMIZE  |
+----------+------------+-----------+
1 row in set (0.00 sec)

mysql> select * from trials;
+----------+--------+----------+----------+---------------------+-------------------------+-------------------------+
| trial_id | number | study_id | state    | value               | datetime_start          | datetime_complete       |
+----------+--------+----------+----------+---------------------+-------------------------+-------------------------+
|        1 |      0 |        1 | COMPLETE |   47.67429274143393 | 2020-10-28 18:54:01.651 | 2020-10-28 18:54:01.744 |
|        2 |      1 |        1 | COMPLETE |  16.564974686882508 | 2020-10-28 18:54:01.777 | 2020-10-28 18:54:01.880 |
|        3 |      2 |        1 | COMPLETE |  22.229764449254283 | 2020-10-28 18:54:01.902 | 2020-10-28 18:54:01.997 |
|        4 |      3 |        1 | COMPLETE |  132.16017574715212 | 2020-10-28 18:54:02.018 | 2020-10-28 18:54:02.105 |
|        5 |      4 |        1 | COMPLETE |   38.05605063130359 | 2020-10-28 18:54:02.125 | 2020-10-28 18:54:02.212 |
|        6 |      5 |        1 | COMPLETE |  209.14879265487292 | 2020-10-28 18:54:02.232 | 2020-10-28 18:54:02.312 |
|        7 |      6 |        1 | COMPLETE |   25.16853774601675 | 2020-10-28 18:54:02.331 | 2020-10-28 18:54:02.411 |
|        8 |      7 |        1 | COMPLETE | 0.03832650787671685 | 2020-10-28 18:54:02.431 | 2020-10-28 18:54:02.516 |
|        9 |      8 |        1 | COMPLETE |  33.827719693154904 | 2020-10-28 18:54:02.535 | 2020-10-28 18:54:02.620 |
|       10 |      9 |        1 | COMPLETE |  134.73204019391721 | 2020-10-28 18:54:02.643 | 2020-10-28 18:54:02.727 |
|       11 |     10 |        1 | COMPLETE |  146.38972740745828 | 2020-10-28 18:54:02.748 | 2020-10-28 18:54:02.845 |
|       12 |     11 |        1 | COMPLETE |  10.828048238611528 | 2020-10-28 18:54:02.866 | 2020-10-28 18:54:02.953 |
|       13 |     12 |        1 | COMPLETE |    64.4046487344336 | 2020-10-28 18:54:02.974 | 2020-10-28 18:54:03.066 |
|       14 |     13 |        1 | COMPLETE |   78.14411654639656 | 2020-10-28 18:54:03.088 | 2020-10-28 18:54:03.187 |
|       15 |     14 |        1 | COMPLETE |   53.57611824640012 | 2020-10-28 18:54:03.209 | 2020-10-28 18:54:03.304 |
|       16 |     15 |        1 | COMPLETE |   15.01804124493015 | 2020-10-28 18:54:03.328 | 2020-10-28 18:54:03.424 |
|       17 |     16 |        1 | COMPLETE |   58.35481595747381 | 2020-10-28 18:54:03.446 | 2020-10-28 18:54:03.540 |
|       18 |     17 |        1 | COMPLETE |  1.2732190134021268 | 2020-10-28 18:54:03.562 | 2020-10-28 18:54:03.660 |
|       19 |     18 |        1 | COMPLETE |  28.211614366408007 | 2020-10-28 18:54:03.684 | 2020-10-28 18:54:03.778 |
|       20 |     19 |        1 | COMPLETE |    10.4046062756045 | 2020-10-28 18:54:03.800 | 2020-10-28 18:54:03.892 |
|       21 |     20 |        1 | COMPLETE |   52.16185609396472 | 2020-10-28 18:54:03.913 | 2020-10-28 18:54:03.998 |
|       22 |     21 |        1 | COMPLETE |   9.822944492560747 | 2020-10-28 18:54:04.019 | 2020-10-28 18:54:04.112 |
|       23 |     22 |        1 | COMPLETE |   8.404142034348341 | 2020-10-28 18:54:04.132 | 2020-10-28 18:54:04.216 |
|       24 |     23 |        1 | COMPLETE |   63.96613652088781 | 2020-10-28 18:54:04.237 | 2020-10-28 18:54:04.323 |
|       25 |     24 |        1 | COMPLETE |   41.20920314571834 | 2020-10-28 18:54:04.344 | 2020-10-28 18:54:04.437 |
|       26 |     25 |        1 | COMPLETE |  62.443761112123084 | 2020-10-28 18:54:04.459 | 2020-10-28 18:54:04.564 |
|       27 |     26 |        1 | COMPLETE |  16.213192052940506 | 2020-10-28 18:54:04.586 | 2020-10-28 18:54:04.681 |
|       28 |     27 |        1 | COMPLETE |   97.07495209802335 | 2020-10-28 18:54:04.702 | 2020-10-28 18:54:04.795 |
|       29 |     28 |        1 | COMPLETE |  55.906245538416286 | 2020-10-28 18:54:04.818 | 2020-10-28 18:54:04.913 |
|       30 |     29 |        1 | COMPLETE |   34.47174422815806 | 2020-10-28 18:54:04.935 | 2020-10-28 18:54:05.029 |
|       31 |     30 |        1 | COMPLETE |   5.290108751069686 | 2020-10-28 18:54:05.050 | 2020-10-28 18:54:05.144 |
|       32 |     31 |        1 | COMPLETE |   26.17664301706204 | 2020-10-28 18:54:05.167 | 2020-10-28 18:54:05.267 |
|       33 |     32 |        1 | COMPLETE |  37.996493070974644 | 2020-10-28 18:54:05.289 | 2020-10-28 18:54:05.387 |
|       34 |     33 |        1 | COMPLETE |   32.12584615584234 | 2020-10-28 18:54:05.409 | 2020-10-28 18:54:05.504 |
|       35 |     34 |        1 | COMPLETE |   6.478393525596584 | 2020-10-28 18:54:05.527 | 2020-10-28 18:54:05.620 |
|       36 |     35 |        1 | COMPLETE |   6.932519664468776 | 2020-10-28 18:54:05.649 | 2020-10-28 18:54:05.765 |
|       37 |     36 |        1 | COMPLETE |   1.981651945620974 | 2020-10-28 18:54:05.786 | 2020-10-28 18:54:05.873 |
|       38 |     37 |        1 | COMPLETE |  11.480550279673512 | 2020-10-28 18:54:05.893 | 2020-10-28 18:54:05.981 |
|       39 |     38 |        1 | COMPLETE |   31.96259061134716 | 2020-10-28 18:54:06.000 | 2020-10-28 18:54:06.087 |
|       40 |     39 |        1 | COMPLETE |   8.795350216717855 | 2020-10-28 18:54:06.112 | 2020-10-28 18:54:06.209 |
|       41 |     40 |        1 | COMPLETE |  30.412890118254357 | 2020-10-28 18:54:06.233 | 2020-10-28 18:54:06.339 |
|       42 |     41 |        1 | COMPLETE |   8.400753459803537 | 2020-10-28 18:54:06.367 | 2020-10-28 18:54:06.465 |
|       43 |     42 |        1 | COMPLETE |  15.477901004462451 | 2020-10-28 18:54:06.492 | 2020-10-28 18:54:06.585 |
|       44 |     43 |        1 | COMPLETE |   33.98820442435554 | 2020-10-28 18:54:06.607 | 2020-10-28 18:54:06.702 |
|       45 |     44 |        1 | COMPLETE |  11.325677417342085 | 2020-10-28 18:54:06.724 | 2020-10-28 18:54:06.811 |
|       46 |     45 |        1 | COMPLETE |   17.86249558131562 | 2020-10-28 18:54:06.835 | 2020-10-28 18:54:06.934 |
|       47 |     46 |        1 | COMPLETE |  0.9553502570566288 | 2020-10-28 18:54:06.958 | 2020-10-28 18:54:07.053 |
|       48 |     47 |        1 | COMPLETE |   15.76649627472142 | 2020-10-28 18:54:07.076 | 2020-10-28 18:54:07.165 |
|       49 |     48 |        1 | COMPLETE |   19.16692742521814 | 2020-10-28 18:54:07.187 | 2020-10-28 18:54:07.280 |
|       50 |     49 |        1 | COMPLETE |   27.09517768964176 | 2020-10-28 18:54:07.303 | 2020-10-28 18:54:07.406 |
+----------+--------+----------+----------+---------------------+-------------------------+-------------------------+
50 rows in set (0.00 sec)

mysql> delete from studies where study_id = 1;
Query OK, 1 row affected (0.01 sec)

mysql> select * from trials;
Empty set (0.00 sec)

mysql> ^DBye