读提交级别下的实践
| 事务1 | 事务2 |
|---|---|
| BEGIN | |
| select *, xmin, xmax from time_test; | |
| update time_test set time = '1456' where id = 1; | |
| select *, xmin, xmax from time_test; | |
| BEGIN; | |
| update time_test set time = '1457' where id = 1; | |
| select *, xmin, xmax from time_test; | |
| select *, xmin, xmax from tim |

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