[Spark-1.5.2]Column renaming with withColumnRenamed has no effect

[Divya Gehlot]

Hi,
I am adding a new column and renaming it at same time but the renaming
doesnt have any effect.

dffiltered =
> dffiltered.unionAll(dfresult.withColumn("Col1",lit("value1").withColumn("Col2",lit("value2")).cast("int")).withColumn("Col3",lit("values3")).withColumnRenamed("Col1","Col1Rename").drop("Col1")


Can anybody help me pointing out my mistake ?

Thanks,
Divya