DDL Support</a></li>
            <li><a href="#time-traveling">Time Traveling</a></li>
          </ul>
        </li>
        <li><a href="#streaming-execution-improvements">Streaming Execution Improvements</a>
          <ul>
            <li><a href="#support-operator-level-state-ttl-in-table-api--sql">Support Operator-Level State TTL in Table API &amp; SQL</a></li>
            <li><a href="#watermark-alignment-and-idleness-detection-in-sql">Watermark Alignment and Idleness Detection in SQL</a></li>
        