https://community.cloudera.com/t5/Support-Questions/SPARK-Dataframe-and-IMPALA-CREATE-TABLE-issue/m-p/55835#M22624 One way is to use selectExpr and use cast. val ConvertedDF = joined.selectExpr("id","cast(mydoublecol as double) mydoublecol"); Wed, 14 Jun 2017 06:44:47 GMT vanhalen 2017-06-14T06:44:47Z