[GitHub] spark issue #17540: [SPARK-20213][SQL][UI] Fix DataFrameWriter operations in...

[cloud-fan]

Github user cloud-fan commented on the issue:

    https://github.com/apache/spark/pull/17540
  
    This PR will change the Spark UI.
    For a simple query `Seq(1 -> "a").toDF("i", "j").write.parquet("/tmp/a")`, 
previously the SQL tab of Spark UI will show
    <img width="287" alt="t1" 
src="https://cloud.githubusercontent.com/assets/3182036/25320581/fd74467e-28da-11e7-80ec-efb4af8a2cdb.png";>
    After this PR it's
    <img width="577" alt="t2" 
src="https://cloud.githubusercontent.com/assets/3182036/25320591/116864a8-28db-11e7-9115-cf0bac552fdf.png";>
    
    I'm not sure which one is better, it depends on how users expect the Spark 
SQL UI for a write operation. cc @zsxwing 
    



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