transactions

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 5 months ago . Improve this question What does DbConnection.EnlistTransaction do? 回答1: DbConnection.EnlistTransaction allows: Joining the connection to a System.Transactions.Transaction. It has some constraints: If the connection is already participating in a "local" transaction (System.Data

问题 I'm using PHP with PDO and InnoDB tables. I only want the code to allow one user-submitted operation to complete, the user can either cancel or complete. But in the case that the user posts both operations, I want one of the requests to fail and rollback, which isn't happening right now, both are completing without exception/error . I thought deleting the row after checking it exists would be enough. $pdo = new PDO(); try { $pdo->beginTransaction(); $rowCheck = $pdo->query("SELECT * FROM

问题 I'm using PHP with PDO and InnoDB tables. I only want the code to allow one user-submitted operation to complete, the user can either cancel or complete. But in the case that the user posts both operations, I want one of the requests to fail and rollback, which isn't happening right now, both are completing without exception/error . I thought deleting the row after checking it exists would be enough. $pdo = new PDO(); try { $pdo->beginTransaction(); $rowCheck = $pdo->query("SELECT * FROM

问题 I'm using PHP with PDO and InnoDB tables. I only want the code to allow one user-submitted operation to complete, the user can either cancel or complete. But in the case that the user posts both operations, I want one of the requests to fail and rollback, which isn't happening right now, both are completing without exception/error . I thought deleting the row after checking it exists would be enough. $pdo = new PDO(); try { $pdo->beginTransaction(); $rowCheck = $pdo->query("SELECT * FROM

问题 I have simple Spring-Service that (among other tasks) starts a spring batch job with the following code: @Autowired private JobRegistry jobRegistry; @Autowired private JobLauncher jobLauncher; public void startMyJob() { Job job = jobRegistry.getJob("myJobName"); JobParameters jobParameters = new JobParametersBuilder().toJobParameters(); jobLauncher.run(job, jobParameters); } This works fine, as long as there is no transaction active when the Serivce-Method is called. However, with an active

问题 I have simple Spring-Service that (among other tasks) starts a spring batch job with the following code: @Autowired private JobRegistry jobRegistry; @Autowired private JobLauncher jobLauncher; public void startMyJob() { Job job = jobRegistry.getJob("myJobName"); JobParameters jobParameters = new JobParametersBuilder().toJobParameters(); jobLauncher.run(job, jobParameters); } This works fine, as long as there is no transaction active when the Serivce-Method is called. However, with an active

问题 I am developing a mobile application that use sqlite and transaction. Below code is that getting order information from user using by using sqlite transaction saving model to multiple db tables. Future<AppResult<int>> save(Order order) async { Database db; var dbReturn = BaseService(); try { db = await databaseOpen(); int dbSaveResult = 0; await db.transaction((txn) async { var batch = txn.batch(); final List<Map<String, dynamic>> exist = await db.query(tableName, where: "id =?", whereArgs:

问题 Having carefully reading the online documentation, I still have a lot of questions about two phase commit in MongoDB. In the section Recovering from Failure Scenarios , why are there only two classes of failures? In my thinking failure can happen in any of these step so there should be a lot more than two classes here. For example what if, (in Apply Transaction to Both Accounts section), after updating account A the database server failed. That means account A lost some money without anything

问题 Having carefully reading the online documentation, I still have a lot of questions about two phase commit in MongoDB. In the section Recovering from Failure Scenarios , why are there only two classes of failures? In my thinking failure can happen in any of these step so there should be a lot more than two classes here. For example what if, (in Apply Transaction to Both Accounts section), after updating account A the database server failed. That means account A lost some money without anything

问题 Having carefully reading the online documentation, I still have a lot of questions about two phase commit in MongoDB. In the section Recovering from Failure Scenarios , why are there only two classes of failures? In my thinking failure can happen in any of these step so there should be a lot more than two classes here. For example what if, (in Apply Transaction to Both Accounts section), after updating account A the database server failed. That means account A lost some money without anything