| id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra |
|---|---|---|---|---|---|---|---|---|---|
| 1 | SIMPLE | child | const | PRIMARY, fk.product.parent_id | PRIMARY | 32 | const, const | 1 | |
| 1 | SIMPLE | parent | const | PRIMARY | PRIMARY | 32 | const, const | 1 |
| id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra |
|---|---|---|---|---|---|---|---|---|---|
| 1 | SIMPLE | child | const | PRIMARY, fk.product.parent_id | PRIMARY | 32 | const, const | 1 | |
| 1 | SIMPLE | parent | const | PRIMARY | PRIMARY | 32 | const, const | 1 |