title: MySQL output being supressed in pipeline
body: <p>I am using a Github Actions pipeline and starting a mysql server using docker within that pipeline. I am attemtping to run a <code>show tables</code> command, however the output is being suppressed.</p>
  <p><a href="https://i.stack.imgur.com/xvunU.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/xvunU.png" alt="enter image description here" /></a></p>
  <p>In the below pipeline i have a docker-compose file which runs a mysql server. Then i am attempting to connect to it and output the tables. However i never receive the output.</p>
  <p><strong>pipeline.yml</strong></p>
  <pre><code>name: test-pipeline
  
  on: [ push ]
  
  jobs:
    test:
      name: Test Migration
      runs-on: self-hosted
      steps:
      - uses: actions/checkout@v2
      - uses: actions/setup-node@v1
        with:
          node-version: '12'
      - name: Setup
        run: |
          docker-compose -f CI/docker-compose.yml up -d
          npm install
      - name: Check tables
        run: |
          mysql --host=127.0.0.1 --protocol=tcp --user=root --password=password testDB -e &quot;show tables;&quot;
          echo &quot;here&quot;
  </code></pre>