是嵌套允许在MySQL的交易？(Are nested transactions allowed in

用MySQL允许使用嵌套事务的？

Answer 1:

InnoDB支持SAVEPOINTS 。

你可以做到以下几点：

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:

从MySQL文档：

交易不能嵌套。 这是隐含的后果对于任何当前事务，当你发出START TRANSACTION语句或其同义词之一提交执行。 https://dev.mysql.com/doc/refman/5.7/en/implicit-commit.html

Answer 3:

如果你使用PHP，那么你可以是有趣的https://github.com/Enelar/phpsql它支持MySQL和pgsql的，并可延伸到其它连接器。

function TransferMoney()
{ // Nested transaction code could not even know that he nested
  $trans3 = db::Begin();
  if (!db::Query("--Withdraw money from user", [$uid, $amount], true))
    return $trans3->Rollback();
  db::Query("--Deposit money to system");
  return $trans3->Commit();
}

$trans = db::Begin();
db::Query("--Give item to user inventory");
    $trans2 = $trans->Begin();
    $trans2->Query("--Try some actions and then decide to rollback");
    $trans2->Rollback();
// Commit or rollback depending on money transfer result
return $trans->Finish(TransferMoney());

文章来源: Are nested transactions allowed in MySQL?