MySQL中是否允许嵌套事务？

Question

MySQL是否允许使用嵌套事务？

Answer 1

InnoDB支持SAVEPOINTS.

您可以执行以下操作:

CREATE TABLE t_test (id INT NOT NULL PRIMARY KEY) ENGINE=InnoDB;

START TRANSACTION;

INSERT
INTO    t_test
VALUES  (1);

SELECT  *
FROM    t_test;

 id
---
  1

SAVEPOINT tran2;

INSERT
INTO    t_test
VALUES  (2);

SELECT  *
FROM    t_test;

 id
---
  1
  2

ROLLBACK TO tran2;

SELECT  *
FROM    t_test;

 id
---
  1

ROLLBACK;

SELECT  *
FROM    t_test;

 id
---

Answer 2

来自MySQL文档:

事务不能嵌套.这是在发出START TRANSACTION语句或其中一个同义词时对任何当前事务执行的隐式提交的结果. https://dev.mysql.com/doc/refman/5.7/en/implicit-commit.html