[GLUTEN-7979][CH] Fix exception cause by one child of UnionExec outputs Array(Nothing) while the other outputs Array(String) #3032

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	name: "Label pull requests"
	on: pull_request_target

	jobs:
	label:
	name: Label pull requests
	runs-on: ubuntu-latest
	permissions:
	contents: read
	pull-requests: write
	steps:
	- uses: actions/labeler@v5
	with:
	repo-token: "${{ secrets.GITHUB_TOKEN }}"
	sync-labels: true

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