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 (126.96.36.199).
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]
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]
8 Dec 2009 06:46
The Script Task and Script component are often used by people developing SSIS packages because they are easy to use and now because SSIS could be perceived to be more developer friendly they are very powerful. That being said we should no be using them everywhere. There are generally Tasks/Components already provided that will do the job it may be that we have to rethink the way we want to draw our package. I had cause last week to break out the script component in SQL Server 2008 SP1 and found that it was broken. I don’t know when it broke as I do not use them all that often.... [More]
28 Oct 2008 08:52
Here is an example of how to do something that in DTS we would have had to do some coding in Script. In our packages we often find the need to follow one path or another in the Control flow based on some condition that exists at runtime. In the example below we use a variable value to decide what path to take. Here is the control flow along with the variables pane. The icons on the workflow indicate we have expressions thereon. The expression on the workflow constraint between tasks 1 and 2 is shown here. As you can see we want the workflow to be followed if our variabl... [More]
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]
28 Oct 2008 07:58
Date Parts Expressions support a range of date related functions such as DATEADD, with the same basic syntax to that found in T-SQL. Whilst the familiarity is very helpful, the difference that catches me out is the format of date part which must be quoted. T-SQL allows this: DATEADD(n, -10, GETDATE())
DATEADD(mi, -10, GETDATE())
DATEADD(minute, -10, GETDATE())
The SSIS equivalent is:
DATEADD("n", -10, GETDATE())
DATEADD("mi", -10, GETDATE())
DATEADD("minute", -10, GETDATE())
Related functions that use the same date part tokens -
13 Oct 2007 14:00
Download the slides and sample code from the Extending SSIS with Custom Tasks presentation, first presented at the SQLBits 2007 Community Conference.
The sample demonstrates a custom task with a connection property, including a property grid drop-down (UITypeEditor) to list all your connections and also add new connections, and a password property flagged as sensitive to honour the package protection level. It also illustrates how to create a user interface for your task.
This session is all about developing for SSIS, writing .Net code to create your own tasks. We cover b... [More]
9 Oct 2005 14:00
In this article we are going to take you through the Execute SQL Task in SQL Server Integration Services for SQL Server 2005 (although it appies just as well to SQL Server 2008). We will be covering all the essentials that you will need to know to effectively use this task and make it as flexible as possible. The things we will be looking at are as follows: A tour of the Task. The properties of the Task. After looking at these introductory topics we will then get into some examples. The examples will show different types of usage for the task: Returning a single value from a SQL q... [More]