Add an API to get TableInfo from ConstraintInfo through a lookup using table_id #397

	name: "format"

	on:
	push:
	branches: [ master ]
	pull_request:
	branches: [ master ]

	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	with:
	submodules: recursive

	- name: Mount bazel cache
	uses: actions/cache@v2
	with:
	path: "~/.cache/bazel" # See https://docs.bazel.build/versions/master/output_directories.html
	key: bazel_format

	- name: Run format.sh
	run: ./format.sh

	- name: Check formatting diff
	run: \|
	CHANGED_FILES="$(git diff-index --name-only HEAD --)"
	if [[ -z "${CHANGED_FILES}" ]]; then
	echo "Success: no formatting changes needed."
	exit 0
	fi
	echo "Found formatting changes in the following files:"
	echo "${CHANGED_FILES}"
	echo ""
	echo "Please run format.sh to apply the changes."
	exit 1

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