test: example PR to test tide

[Mini256]

What problem does this PR solve?

Issue Number: close #1, close #40

What's Changed:

For SimpleAggregation does not return row if there is no input rows

Related changes

• PR to update pingcap/docs/pingcap/docs-cn:
• PR to update pingcap/tidb-ansible:
• Need to cherry-pick to the release branch

[mini-bot]

[REVIEW NOTIFICATION]

This pull request has not been approved.

To complete the pull request process, please ask the reviewers in the list to review by filling /cc @reviewer in the comment. After your PR has acquired the required number of LGTMs, you can assign this pull request to the committer in the list by filling /assign @committer in the comment to help you merge this pull request.

The full list of commands accepted by this bot can be found here.

Reviewer can indicate their review by submitting an approval review. Reviewer can cancel approval by submitting a request changes review.

[mini-bot]

@Mini256: You can't add the status/can-merge label.

In response to adding label named status/can-merge. Instructions for interacting with me using PR comments are available [here](https://prow.tidb.io/command-help). If you have questions or suggestions related to my behavior, please file an issue against the [ti-community-infra/tichi](https://github.com/ti-community-infra/tichi/issues/new?title=Prow%20issue:) repository.

[Mini256]

/merge

[mini-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 1be827ef69ff89b1b7ce6f2b005e2abf6cb7969d