c_work_sta_relations
Description
relation between work and stoppings
Table Definition
```sql CREATE TABLE `c_work_sta_relations` ( `work_id` bigint unsigned NOT NULL COMMENT 'target work id', `sta_time_from_id` bigint unsigned NOT NULL COMMENT 'target origin station arrive/departure time record id', `sta_time_to_id` bigint unsigned NOT NULL COMMENT 'target destination station arrive/departure time record id', `is_no_work` bit(1) NOT NULL COMMENT 'whether the work is phoresis', PRIMARY KEY (`work_id`,`sta_time_from_id`), KEY `sta_time_from_id` (`sta_time_from_id`), KEY `sta_time_to_id` (`sta_time_to_id`), CONSTRAINT `c_work_sta_relations_ibfk_1` FOREIGN KEY (`work_id`) REFERENCES `c_works` (`id`) ON DELETE CASCADE, CONSTRAINT `c_work_sta_relations_ibfk_2` FOREIGN KEY (`sta_time_from_id`) REFERENCES `sta_time` (`id`), CONSTRAINT `c_work_sta_relations_ibfk_3` FOREIGN KEY (`sta_time_to_id`) REFERENCES `sta_time` (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci COMMENT='relation between work and stoppings' ```Columns
| # | Name | Type | Default | Nullable | Children | Parents | Comment |
|---|---|---|---|---|---|---|---|
| 1 | work_id | bigint unsigned | false | c_works | target work id | ||
| 2 | sta_time_from_id | bigint unsigned | false | sta_time | target origin station arrive/departure time record id | ||
| 3 | sta_time_to_id | bigint unsigned | false | sta_time | target destination station arrive/departure time record id | ||
| 4 | is_no_work | bit(1) | false | whether the work is phoresis |
Constraints
| # | Name | Type | Definition |
|---|---|---|---|
| 1 | c_work_sta_relations_ibfk_1 | FOREIGN KEY | FOREIGN KEY (work_id) REFERENCES c_works (id) |
| 2 | c_work_sta_relations_ibfk_2 | FOREIGN KEY | FOREIGN KEY (sta_time_from_id) REFERENCES sta_time (id) |
| 3 | c_work_sta_relations_ibfk_3 | FOREIGN KEY | FOREIGN KEY (sta_time_to_id) REFERENCES sta_time (id) |
| 4 | PRIMARY | PRIMARY KEY | PRIMARY KEY (work_id, sta_time_from_id) |
Indexes
| # | Name | Definition |
|---|---|---|
| 1 | sta_time_from_id | KEY sta_time_from_id (sta_time_from_id) USING BTREE |
| 2 | sta_time_to_id | KEY sta_time_to_id (sta_time_to_id) USING BTREE |
| 3 | PRIMARY | PRIMARY KEY (work_id, sta_time_from_id) USING BTREE |
Relations
Generated by tbls