SQL Server Integration Services: Difference between revisions

Revision as of 11:39, 13 December 2012

Revision as of 11:43, 13 December 2012

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; Connections : A connection includes the information necessary to connect to a particular data source. Tasks can reference the connection by its name, allowing the details of the connection to be changed or configured at run time.

; Tasks : A task is an atomic work unit that performs some action. There are a couple of dozen tasks that ship in the box, ranging from the file system task (which can copy or move files) to the data transformation task. The data transformation task actually copies data; it implements the ETL features of the product

; Precedence constraints : Tasks are linked by precedence constraints. The precedence constraint preceding a particular task must be met before that task executes. The run time supports executing tasks in parallel if their precedence constraints so allow. Constraints'''Const'''raints may otherwise allow different paths of execution depending on the success or failure of other tasks. Together with the tasks, precedence constraints comprise the '''workflow''' of the package.

; Event handlers : A workflow can be designed for a number of events in the different scopes where they might occur. In this way, tasks may be executed in response to happenings within the package —such as cleaning up after errors.

; Variables : Tasks may reference variables to store results, make decisions, or affect their configuration.