Github user pravingadakh commented on a diff in the pull request: https://github.com/apache/spark/pull/11575#discussion_r55349423 --- Diff: mllib/src/test/scala/org/apache/spark/ml/feature/StringIndexerSuite.scala --- @@ -178,6 +178,20 @@ class StringIndexerSuite } } + test("StringIndexer on column with empty string values") { + val data = sc.parallelize(Seq((0, "a"), (1, ""), (2, "c"), (3, "a"), (4, "a"), (5, "c")), 2) + val df = sqlContext.createDataFrame(data).toDF("id", "label") --- End diff -- @jaceklaskowski Yes you are right. I'm using Intellij ide, which requires you add `import sqlContext.implicits._` in order to use syntax mentioned by you. Thus I was avoiding that.
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