mysql之savepoint
2021/12/26 19:10:58
本文主要是介绍mysql之savepoint,对大家解决编程问题具有一定的参考价值,需要的程序猿们随着小编来一起学习吧!
demo
mysql> begin; Query OK, 0 rows affected (0.00 sec) mysql> select * from planet_user_blacklist; +----+----------+------------+------------+----------+---------------------------------+ | id | uid | created_at | updated_at | add_type | address | +----+----------+------------+------------+----------+---------------------------------+ | 1 | 29904034 | 1 | 2 | 0 | 广州市番禺区番禺广场1 | | 2 | 2839939 | 2 | 2 | 0 | 广州市番禺区南村2 | +----+----------+------------+------------+----------+---------------------------------+ 2 rows in set (0.00 sec) mysql> update planet_user_blacklist set updated_at = 100 where id = 1; Query OK, 1 row affected (0.01 sec) Rows matched: 1 Changed: 1 Warnings: 0 mysql> savepoint test1; Query OK, 0 rows affected (0.00 sec) mysql> update planet_user_blacklist set updated_at = updated_at +1000 where id = 1; Query OK, 1 row affected (0.00 sec) Rows matched: 1 Changed: 1 Warnings: 0 mysql> select * from planet_user_blacklist; +----+----------+------------+------------+----------+---------------------------------+ | id | uid | created_at | updated_at | add_type | address | +----+----------+------------+------------+----------+---------------------------------+ | 1 | 29904034 | 1 | 1100 | 0 | 广州市番禺区番禺广场1 | | 2 | 2839939 | 2 | 2 | 0 | 广州市番禺区南村2 | +----+----------+------------+------------+----------+---------------------------------+ 2 rows in set (0.00 sec) mysql> rollback to test1; Query OK, 0 rows affected (0.00 sec) mysql> update planet_user_blacklist set updated_at = updated_at +10000 where id = 1; Query OK, 1 row affected (0.00 sec) Rows matched: 1 Changed: 1 Warnings: 0 mysql> select * from planet_user_blacklist; +----+----------+------------+------------+----------+---------------------------------+ | id | uid | created_at | updated_at | add_type | address | +----+----------+------------+------------+----------+---------------------------------+ | 1 | 29904034 | 1 | 10100 | 0 | 广州市番禺区番禺广场1 | | 2 | 2839939 | 2 | 2 | 0 | 广州市番禺区南村2 | +----+----------+------------+------------+----------+---------------------------------+ 2 rows in set (0.00 sec) mysql> commit; Query OK, 0 rows affected (0.01 sec) mysql> select * from planet_user_blacklist; +----+----------+------------+------------+----------+---------------------------------+ | id | uid | created_at | updated_at | add_type | address | +----+----------+------------+------------+----------+---------------------------------+ | 1 | 29904034 | 1 | 10100 | 0 | 广州市番禺区番禺广场1 | | 2 | 2839939 | 2 | 2 | 0 | 广州市番禺区南村2 | +----+----------+------------+------------+----------+---------------------------------+ 2 rows in set (0.00 sec)
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