Does Java Connection.close rollback?
According to the javadoc, you should try to either commit or roll back before calling the close method. The results otherwise are implementation-defined.
transactions
Are PostgreSQL functions transactional?
PostgreSQL 12 update: there is limited support for top-level PROCEDUREs that can do transaction control. You still cannot manage transactions in regular SQL-callable functions, so the below remains true except when using the new top-level procedures. Functions are part of the transaction they’re called from. Their effects are rolled back if the transaction rolls back. … Read more
C# – System.Transactions.TransactionScope
TransactionScope is not only for the databases. Every component that implements IEnlistmentNotification interface can participate in two-phase commit of the transaction scope. Here is an example of transactional in-memory storage: http://www.codeproject.com/KB/dotnet/Transactional_Repository.aspx Also, I’m not sure if there are components in .NET for transactional file IO, but it is pretty easy to implement such component – … Read more
In Python, Using pyodbc, How Do You Perform Transactions?
By its documentation, pyodbc does support transactions, but only if the odbc driver support it. Furthermore, as pyodbc is compliant with PEP 249, data is stored only when a manual commit is done. This means that you have to explicitely commit() the transaction, or rollback() the entire transaction. Note that pyodbc also support autocommit feature, … Read more
TransactionScope With Files In C# [duplicate]
You’re looking for Transactional NTFS, introduced by Windows Vista. Here is a managed wrapper.
PHP prepared statements and transactions in a loop [duplicate]
Your loop can be optimized by pulling the prepare and bind_param statements out of the loop. $value = null; $mysqli->autocommit(FALSE); $sql = “INSERT INTO temp (`fund_id`) VALUES (?)”; $stmt = $mysqli->prepare($sql); $stmt->bind_param(‘i’, $value); foreach ($pdata as $value) { $stmt->execute(); } $mysqli->commit(); You have turned off autocommit with your autocommit(FALSE) line and therefore don’t need to … Read more
Knex Transaction with Promises
You need to return a promise from the inner query in order for the outer chain to be chained with that. You also swallow any errors because you don’t rethrow them – it’s better to use .catch() for this reason because it makes it more clearer what is happening – that is what would happen … Read more
Automatic Rollback if COMMIT TRANSACTION is not reached
No, transactions are not rolled back as soon as an error occurs. But you may be using a client-application which applies this policy. For example, if you are using the mysql command-line client, then it normally stops executing when an error occurs and will quit. Quitting while a transaction is in progress does cause it … Read more
MySQL ‘select for update’ behaviour
Let me go through your cases and explain how these locks work: 1 case T1 wants to update some rows in your test table. This transaction puts IX lock on all table and X lock on the first 5 rows. T2 wants to update some rows in your test table. This transaction puts IX (because … Read more
EJB 3.0 – Nested Transaction != Requires New?
RequiresNew does not create a nested transaction because the first transaction is suspended while the second transaction is running. A nested transaction looks like this: Nested transaction example > method1 – begin tran1 > method2 – begin tran2 workA < method2 – commit tran2 < method1 – rollback tran1 (tran2 also rolled back because it’s … Read more