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Posted to commits@dolphinscheduler.apache.org by "njnu-seafish (via GitHub)" <gi...@apache.org> on 2026/03/10 06:27:17 UTC
[I] [Doc][Parameter Context] Improvement Parameter passing behavior doc [dolphinscheduler]
njnu-seafish opened a new issue, #18045:
URL: https://github.com/apache/dolphinscheduler/issues/18045
### Search before asking
- [x] I had searched in the [issues](https://github.com/apache/dolphinscheduler/issues?q=is%3Aissue) and found no similar feature requirement.
### Description
> 1. Parameter passing behavior has changed in version 3.3.x**
In the new version after 3.3.0, the logic for obtaining local variables has been modified: downstream node B can only use the out type output X of upstream node A if it has configured an IN type local variable X.
Howerver，Exception for Switch Tasks: Since Switch tasks lack an interface for custom parameters, they can consume upstream OUT variables without explicit IN variable mapping.
### Documentation Links
https://dolphinscheduler.apache.org/zh-cn/docs/3.4.1/guide/parameter/context
### Are you willing to submit a PR?
- [x] Yes I am willing to submit a PR!
### Code of Conduct
- [x] I agree to follow this project's [Code of Conduct](https://www.apache.org/foundation/policies/conduct)
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Re: [I] [Doc][Parameter Context] Improvement Parameter passing behavior doc [dolphinscheduler]
Posted by "SbloodyS (via GitHub)" <gi...@apache.org>.
SbloodyS closed issue #18045: [Doc][Parameter Context] Improvement Parameter passing behavior doc
URL: https://github.com/apache/dolphinscheduler/issues/18045
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Re: [I] [Doc][Parameter Context] Improvement Parameter passing behavior doc [dolphinscheduler]
Posted by "njnu-seafish (via GitHub)" <gi...@apache.org>.
njnu-seafish commented on issue #18045:
URL: https://github.com/apache/dolphinscheduler/issues/18045#issuecomment-4029147598
1, Create a workflow where Node A is configured with an OUT parameter param1 set to 111, and Node B is a Switch task without configuring an IN parameter
<img width="1617" height="629" alt="Image" src="https://github.com/user-attachments/assets/088d0a80-fb84-4f9a-9619-dc07103865f9" />
<img width="1173" height="797" alt="Image" src="https://github.com/user-attachments/assets/02416331-3f4f-47fb-a2ab-a16b7a25fd1a" />
<img width="1217" height="1202" alt="Image" src="https://github.com/user-attachments/assets/d122aeb5-dc8f-461c-888d-518cbcef8ec4" />
2, Unlike other task types, Switch tasks do not require the definition of an IN-type local variable X to retrieve the OUT-type output X from an upstream node. This is because the Switch task type does not support the configuration of custom parameters.
<img width="1545" height="574" alt="Image" src="https://github.com/user-attachments/assets/0f202820-3bf8-4c57-a0ad-0b5b37c2997a" />
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