Help Understanding "Set Pipeline Variable" in Microsoft Fabric Pipelines

HamidBee — Tue, 05 Nov 2024 10:15:47 GMT

Hi all,

I’m working on a data pipeline in Microsoft Fabric and came across the "Set Pipeline Variable" activity, but I'm not quite clear on its purpose and usage. Could someone explain:

What exactly is a pipeline variable in Microsoft Fabric, and what is it typically used for?
At what stage or part of the pipeline process do you usually use this variable-setting activity?
What’s the difference between "Pipeline variable" and "Pipeline return value" in the "Variable type" option? How does each one function in the context of a pipeline?

Any insights or examples would be greatly appreciated! Thanks in advance.

Re: Help Understanding "Set Pipeline Variable" in Microsoft Fabric Pipelines

Expiscornovus — Tue, 05 Nov 2024 11:05:38 GMT

Hi HamidBee

1. To temporary store a value which you can easily reuse that value in other steps of your data pipeline and reference it via the variable. It is a typical concept of programming as well.

2. An example has been shared by Microsoft, you can for example is it in a counter in an for each loop to keep track of the number of loops: https://learn.microsoft.com/en-us/azure/data-factory/control-flow-set-variable-activity#incrementing-a-variable

3. The Pipeline return value can be used to interact with values of child pipelines, for reference see this section of the same document:

https://learn.microsoft.com/en-us/azure/data-factory/control-flow-set-variable-activity#setting-a-pipeline-return-value-with-ui

https://learn.microsoft.com/en-us/azure/data-factory/tutorial-pipeline-return-value

Hopefully this helps a bit?

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Help Understanding "Set Pipeline Variable" in Microsoft Fabric Pipelines

Re: Help Understanding "Set Pipeline Variable" in Microsoft Fabric Pipelines