title: How to sink data into a single json file using flink v1.13+?
body: <p>I want to sink my filtered data into a single json file,but got several parts in an output directory. Here is my code:</p>
  <pre><code>         String sinkSql =
                  &quot;create TEMPORARY table FileSink(&quot; +
                          &quot;name STRING,&quot; +
                          &quot;timestamps BIGINT,&quot; +
                          &quot;temp DOUBLE&quot; +
                          &quot;) WITH(&quot; +
                          &quot;'connector'='filesystem',&quot; +
                          &quot;'path'='E:\\output',&quot; +
                          &quot;'format' ='json')&quot;;
          tableEnvironment.executeSql(sinkSql);
  
          filter.executeInsert(&quot;FileSink&quot;);
  </code></pre>