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Theory for nested transactions is similar to the theory for flat transactions. [ 2 ] The banking industry usually processes financial transactions using open nested transactions , [ citation needed ] which is a looser variant of the nested transaction model that provides higher performance while accepting the accompanying trade-offs of ...
Multi-level transactions are a variant of nested transactions where the sub-transactions take place at different levels of a layered system architecture (e.g., with one operation at the database-engine level, one operation at the operating-system level). [3] Another type of transaction is the compensating transaction.
A savepoint is a way of implementing subtransactions (also known as nested transactions) within a relational database management system by indicating a point within a transaction that can be "rolled back to" without affecting any work done in the transaction before the savepoint was created. Multiple savepoints can exist within a single ...
The transaction-to-thread association is managed transparently by the Transaction Manager. Support for nested transactions is not required. The UserTransaction.begin method throws the NotSupportedException when the calling thread is already associated with a transaction and the transaction manager implementation does not support nested ...
The commit-request phase (or voting phase), in which a coordinator process attempts to prepare all the transaction's participating processes (named participants, cohorts, or workers) to take the necessary steps for either committing or aborting the transaction and to vote, either "Yes": commit (if the transaction participant's local portion ...
Transactions may be nested up to 7 levels, with one additional level reserved for ESE internal use. This means that a part of a transaction may be rolled back, without need to roll back the entire transaction; a CommitTransaction of a nested transaction merely signifies the success of one phase of processing, and the outer transaction may yet fail.
In the absence of a START TRANSACTION or similar statement, the semantics of SQL are implementation-dependent. The following example shows a classic transfer of funds transaction, where money is removed from one account and added to another. If either the removal or the addition fails, the entire transaction is rolled back.
1 Which databases support nested transactions? 1 comment. 2 Merge into Database_transaction article. 1 comment. 3 I know you can't expect much from Wikipedia. 1 comment.