transactions

问题 I am using Django's ORM to get newly added entries from a Db and pass them to a Messaging queue. I am doing this in an infinite while loop , The PROBLEM in every loop iteration I am getting the same queryset even when I have added/deleted/edited entries when this script is running, The code goes like this : while True : sleep(10 seconds) # Below is the problem line, I get the same query-set every time in new_objects # even when I have added/deleted/edited entries while this daemon is running.

问题 Does mysqli_begin_transaction() achieve the same functionality as mysqli_autocommit () ? 回答1: mysqli_autocommit() sets autocommit mode permanently. It means that if you set it to 0 and then commit a transaction, the mode will remain 0. mysqli_begin_transaction() begins a single transaction. It means after commit the mode reverts to its previous state. besides, it allows you to fine tune a transaction, starting it in one of the following modes: MYSQLI_TRANS_START_READ_ONLY. MYSQLI_TRANS_START

问题 I have the following test.. @RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration(locations = {"/schedule-agents-config-context.xml"}) @TransactionConfiguration(transactionManager = "transactionManager", defaultRollback = true) @Transactional public class H2TransactionNotWorkingTest extends SubmitAgentIntegratedTestBase { private static final int FIVE_SUBMISSIONS = 5; @Autowired private ApplicationSubmissionInfoDao submissionDao; private FakeApplicationSubmissionInfoRepository

问题 I am node.js with pg-promise for postgres, trying to do a transaction with 2 inserts in sequence. The result id of the 1st insert should be used in the next insert in the transaction. Rollback if any of the query fails. Nesting 2nd db.none inside .then() of 1st db.one will NOT rollback 1st query. So using a transaction here. I am stuck at using the result of 1st query in 2nd. Here is what I have now. db.tx(function (t) { return t.sequence([ // generated using pgp.helpers.insert for singleData

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . I'm currently working on a game server for a turn-based persistent world game primarily targeted at smartphones, and I'm currently beginning to implement the persistence layer and I'm looking for some tips/advice. I originally planned to use mybatis for the persistance layer and the mybatis-guice addon

问题 I tried to shorten this to what I think is relevant, I hope it's sufficient and not overwhelming. Please help! I'm converting a small wicket+databinder+hibernate web application to use wicket+spring+hibernate . I have a DAO service class, with a hibernate SessionFactory injected by Spring. I am able to do read-only operations using the session factory (autocommit is on by default). What I want to do is use the HibernateTransactionManager and the @Transactional annotation to do a transactional

问题 The AppEngine documentation has a few examples of transactions, using the AppEngine native technique to make transacted queries on native objects. Per the docs at http://www.allbuttonspressed.com/projects/django-nonrel [1], I'd like to use AppEngine transactions to query Django objects. Is this possible? def txn(): index = random.randint(0, NUM_SHARDS - 1) shard_name = "shard" + str(index) counter = SimpleCounterShard.objects.filter(name=shard_name) # Make counter if it doesn't exist if not

问题 I'm having difficulty with my EJB3.1 bean initialisation and more specifically to do with it failing due to perceived transaction rollback, even though I've marked the bean with @TransactionAttribute(NOT_SUPPORTED) . This should mean that any client transaction is paused on bean method entry until exit (when it will be resumed. It's definitely the transactional apprach I want. The "gist" of the code and error are as follows (note some of it is hand-cranked to hide details but is all relevant

问题 I've spent the better part of the day trying to find an answer to this, but there just doesn't seem to be one out there. I have need of function which creates a row in a table, retrieves the auto-increment from the inserted row, and then uses that value to insert another row in a second table. Something functionally similar to the following php: $mysql_query("INSERT INTO table1 SET columns='values'"); $id = mysql_insert_id(); $mysql_query("INSERT INTO table2 SET id='$id', columns='values'");

问题 I am inserting a few rows with in a transaction. But when I do a 'END TRANSACTION' its taking around 250ms to execute while the 'BEGIN TRANSACTION' hardly takes around 1ms. I need to fasten the speed here to suite my application. How can I? [edit] * A single thread is accessing the database. * I have 2 tables in this database and both these have primary key on them. * With in a transaction there is exactly one insert into each the tables. * OS - windows 7 回答1: Using the out of the box, or