transactions

问题 Tx is committed when : request success callback returns - that means that multiple requests can be executed within transaction boundaries only when next request is executed from success callback of the previous one when your task returns to event loop It means that if no requests are submitted to it, it is not committed until it returns to event loop. These facts pose 2 problematic states : placing a new IDB request by enqueuing a new task to event loop queue from within the success callback

问题 I have been trying to execute sql scripts from dotnet (C#) but the sql scripts could contain GO statements and I would like to be able to wrap the collection of scripts in a transaction. I found this question and the accepted answer got me going for handling the GO statements, but if I use a BeginTransaction it throws a InvalidOperationException at the "new ServerConnection" line. SqlConnection connection = new SqlConnection(connectionString); connection.Open(); SqlTransaction transaction =

问题 I need to understand about sql server transaction? I have gone through some articles available on google but I have not understood anything. Can anyone help me? 回答1: You can explicitly start a transaction by writing BEGIN TRANSACTION . You end the transaction by running COMMIT TRANSACTION . Before the COMMIT is run, the tables affected by your query can still be rolled back to the state they were in at the BEGIN TRANSACTION point-in-time. This is useful when you are writing a stored procedure

问题 I need to understand about sql server transaction? I have gone through some articles available on google but I have not understood anything. Can anyone help me? 回答1: You can explicitly start a transaction by writing BEGIN TRANSACTION . You end the transaction by running COMMIT TRANSACTION . Before the COMMIT is run, the tables affected by your query can still be rolled back to the state they were in at the BEGIN TRANSACTION point-in-time. This is useful when you are writing a stored procedure

问题 Say that I have a basic Spring Integration flow like: <jms:inbound-channel-adapter> <poller> <transactional/> </poller> </jms:inbound-channel-adapter> <some:outbound-channel-adapter/> If the outbound adapter throws an exception the entire transaction is rolled back. If the inbound message subsystem supports it the message will be redelivered a number of times until it will eventually be posted on the Dead Letter Queue. This is fine - except that the exception itself is lost which is very

问题 I have two table with below model: CREATE TABLE IF NOT EXISTS INV ( CODE TEXT, PRODUCT_CODE TEXT, LOCATION_NUMBER TEXT, QUANTITY DECIMAL, CHECK_INDICATOR BOOLEAN, VERSION BIGINT, PRIMARY KEY ((LOCATION_NUMBER, PRODUCT_CODE))); CREATE TABLE IF NOT EXISTS LOOK_INV ( LOCATION_NUMBER TEXT, CHECK_INDICATOR BOOLEAN, PRODUCT_CODE TEXT, CHECK_INDICATOR_DDTM TIMESTAMP, PRIMARY KEY ((LOCATION_NUMBER), CHECK_INDICATOR, PRODUCT_CODE)) WITH CLUSTERING ORDER BY (CHECK_INDICATOR ASC, PRODUCT_CODE ASC); I

问题 I'm trying to wrap my head around transactions in event sourcing. I have one aggregate (transaction scope) in my event store. A command gets processed and is producing 10 events. Now, can this be handled as 1 transaction or is this 10 transactions? With transaction I mean changes to the state that is only valid together as a whole. Have I designed my events wrong if they are split up into many events like this even though I want them to be handled as a whole? I tend to think that it is the

问题 I have an OSGi bundle in which I declare a service and inject into it a transaction with blueprint: <bean id="MyServiceImpl" class="com.test.impl.MyServiceImpl"> <jpa:context property="em" unitname="mypu" /> <tx:transaction method="*" value="Required" /> </bean> <service id="MyService" ref="MyServiceImpl" interface="com.test.api.MyService" /> In this service I have two methods each one of which is writing data in the database, something like the following: public void createParent() throws

问题 I have a TransactionScope() block. It always gets stuck in an insert statement. It appears in the Activity Monitor as a Blocking Task, so it blocks the SQL server, and after the timeout, I get this error: The operation is not valid for the state of the transaction. What’s going wrong? const TransactionScopeOption opt = new TransactionScopeOption(); TimeSpan span = new TimeSpan(0, 0, 1, 30); try { using (TransactionScope scope01 = new TransactionScope(opt, span)) { using (var sqlcon = new

问题 I have a complex action inside controller that performs several update queries to the database. How can I make this action acts like transaction without any structural refactoring? 回答1: MyModel.transaction do begin @model.update_stuff @sub_model.update_stuff @sub_sub_model.update_stuff rescue ActiveRecord::StatementInvalid # or whatever # rollback is automatic, but if you want to do something additional, # add it here end end Here are the docs for the transaction method. 回答2: It's posible to