transactions

问题 At present while doing any database related code i use the following structure: try { using(FBConnection con = new FBConnection('connectionstringhere')) { con.Open(); using(FBCommand cmd = FBCommand("qryString",con)) { cmd.Parameters.Add("paramSql", FbDbType.Date).Value ="somevalue"; cmd.CommandType = CommandType.Text; using(FBDatareader rdr = cmd.ExecuteReader()) { while(rdr.Read()) { //some code here } } } } } catch(FBException ex) { MessageBox.Show(ex.Message); } Now i want to incorporate

问题 Question is in the title. I'd just love to understand why this isn't supported? Just to clarify this is MS Sql Server 2005 / 2008. 回答1: Because it's potentially inconsistent and it's weaker out of the box than lock-based isolation (ANSI SQL). Or, the downsides (such as this banking example) require more work and thinking to keep things correct so it's simply safer not to support it. Finally (I've not checked), is it in the ANSI standard? It could be a very bespoke solution and you'd be unable

问题 I want to insert two tables A(id,firstName, lastName) and B(id, id from A, xyz) . How can I insert the two tables simultaneously using transaction? And also if B is not inserted then rollback the A also. Could you please help me. 回答1: Use mysql_insert_id() if you're going down that path. <? mysql_query("START TRANSACTION"); $q1 = mysql_query("INSERT INTO table A (id, firstName, lastName) VALUES (?, ?, ?)"); // This is your baby. The id of the last record inserted $last_inserted_id = mysql

问题 I have a Spring Boot application with Hibernate, with a bunch of DAOs annotated with @Repository and Spring's @Transactional . Everything works fine. Then I decide to move common methods (persist, find, merge) to an AbstractDao . Writing operations (persist, merge) start throwing that No EntityManager with actual transaction available for current thread - cannot reliably process 'persist' call exception. I try adding @Transactional to AbstractDao , and contrary to my expectations, it fixes it

问题 I have a Spring Boot application with Hibernate, with a bunch of DAOs annotated with @Repository and Spring's @Transactional . Everything works fine. Then I decide to move common methods (persist, find, merge) to an AbstractDao . Writing operations (persist, merge) start throwing that No EntityManager with actual transaction available for current thread - cannot reliably process 'persist' call exception. I try adding @Transactional to AbstractDao , and contrary to my expectations, it fixes it

问题 While very familiar to Webforms and Linq, I am a novice to the ASP.NET MVC and NHibernate World. I have been working through a project using Bob Cravens' examples. My application is mostly reads and non-sequential writes, so typically I would not use a transactions. But to implement the Unit-of-Work pattern, all my research including Ayende's blog says I should. The problem I have is this - Ninject creates a Session and Opens a Transaction. Ninject injects repositories into services, and

问题 While very familiar to Webforms and Linq, I am a novice to the ASP.NET MVC and NHibernate World. I have been working through a project using Bob Cravens' examples. My application is mostly reads and non-sequential writes, so typically I would not use a transactions. But to implement the Unit-of-Work pattern, all my research including Ayende's blog says I should. The problem I have is this - Ninject creates a Session and Opens a Transaction. Ninject injects repositories into services, and

问题 I want to implement an audit log using triggers which gets fired on created, changed and deleted data to store some values. Those triggers should be able to use user ids which made the changes and which are managed by the web application. I have some ideas on providing this data, but I don't seem to fully understand what the execution context of a trigger is. I've read through the PostgreSQL docs Overview of Trigger Behavior and others but my question doesn't seem to be answered. What I want

问题 I'm looking into rollback management with MySQLi, and I'm curious what is the benefit of begin_transaction() method. Many examples I look at skip it entirely by turning autocommit off, then executing some queries with success value returned, and testing a compound Boolean based on the return values to commit or rollback the multiple statements. It doesn't seem like the begin_transaction() method actually does any useful work in a scenario where we are looking to commit or rollback a group of

问题 using (System.Transactions.TransactionScope ts = new System.Transactions.TransactionScope()) { TableAdapter.Insert("test","test"); ts.Complete(); } I am getting this error :Unable to load DLL ' oramts.dll ': The specified module could not be found. (Exception from HRESULT: 0x8007007E) I have Oracle Client installed with Oracle services for Windows Transaction even the DLL file oramts.dll is in [ORALCE_HOME]/bin Thanks in advance 回答1: http://jelle.druyts.net/2006/06/25