zjffdu opened a new pull request #3321: [ZEPPELIN-3487]. Spark SQL (%sql) paragraphs for DDLs should suppress datagrid-ui URL: https://github.com/apache/zeppelin/pull/3321 ### What is this PR for? This PR will return empty string when the returned DataFrame of sql is empty, but it is not true for spark 1.x, so for spark 1.x, user would still see empty table in frontend. ### What type of PR is it? [Bug Fix] ### Todos * [ ] - Task ### What is the Jira issue? * https://issues.apache.org/jira/browse/ZEPPELIN-3487 ### How should this be tested? * CI pass ### Screenshots (if appropriate)  ### Questions: * Does the licenses files need update? No * Is there breaking changes for older versions? No * Does this needs documentation? No
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