Rollback transaction

# Session::rollback

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Session::rollback — Rollback transaction

### 说明

public function mysql_xdevapi\Session::rollback(): void

Rollback the transaction.

### 参数

此函数没有参数。

### 返回值

An SqlStatementResult object.

### 示例

示例 #1 mysql_xdevapi\Session::rollback() example

    <?php
    $session    = mysql_xdevapi\getSession("mysqlx://user:password@localhost");
    $collection = $session->getSchema("addressbook")->getCollection("names");

    $session->startTransaction();
    $collection->add( '{"test1":1, "test2":2}' )->execute();

    $savepoint = $session->setSavepoint();

    $collection->add( '{"test3":3, "test4":4}' )->execute();

    $session->releaseSavepoint($savepoint);
    $session->rollback();
    ?>

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