transaction

A transaction is a collection of one or more command scripts that read and/or write to the relational database. A transaction is a request to the AVEVA Historian to find, enter, change, or return information about an object the relational database. All transactions are processed at runtime and are performed as a single unit of work. If a single script fails at any point in the transaction, the entire transaction will be rolled back and the original state of the database before the transaction started will be restored. See also transaction log.