File Watcher Task

by Darren Green 6 Jun 2016 16:07
The task will detect changes to existing files as well as new files, both actions will cause the file to be found when available. A file is available when the task can open it exclusively. This is important for files that take a long time to be written, such as large files, or those that are just written slowly or delivered via a slow network link. It can also be set to look for existing files first (1.2.4.55). The full path of the found file is returned in up to three ways: The ExecValueVariable of the task. This can be set to any String variable. The OutputVariableName when specified. T... [More]

Have you used the ExecutionValue and ExecValueVariable properties?

by Darren Green 4 May 2010 08:36
The ExecutionValue execution value property and it’s friend ExecValueVariable are a much undervalued feature of SSIS, and many people I talk to are not even aware of their existence, so I thought I’d try and raise their profile a bit. The ExecutionValue property is defined on the base object Task, so all tasks have it available, but it is up to the task developer to do something useful with it. The basic idea behind it is that it allows the task to return something useful and interesting about what it has performed, in addition to the standard success or failure result. The best example perh... [More]

Creating packages in code – Execute SQL Task

by Darren Green 19 May 2009 08:30
The Execute SQL Task is for obvious reasons very well used, so I thought if you are building packages in code the chances are you will be using it. Using the task basic features of the task are quite straightforward, add the task and set some properties, just like any other. When you start interacting with variables though it can be a little harder to grasp so these samples should see you through. Some of these more advanced features are explained in much more detail in our ever popular post The Execute SQL Task, here I’ll just be showing you how to implement them in code. The abbreviated cod... [More]

Searching for tasks with code – Executables and Event Handlers

by Darren Green 12 May 2009 09:40
Searching packages or just enumerating through all tasks is not quite as straightforward as it may first appear, mainly because of the way you can nest tasks within other containers. You can see this illustrated in the sample package below where I have used several sequence containers and loops. To complicate this further all containers types, including packages and tasks, can have event handlers which can then support the full range of nested containers again. Towards the lower right, the task called SQL In FEL also has an event handler not shown, within which is another Execute SQL Task,... [More]

Disabling tasks through Expressions

by Darren Green 28 Oct 2008 08:43
All Containers include a Disable property. This is what is used for the right-click Disable/Enable functionality you may have used when developing packages in the designer. Expressions are evaluated at run-time and can be used to set properties, so it follows that you could use an expression on the Disable property to control execution of the container. This will not always work. By design, the Disable property is evaluated quite early on during package execution. This may be before you have set a variable that is subsequently used within your Disable property expression. This may caused unex... [More]

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