Github user yhuai commented on a diff in the pull request: https://github.com/apache/spark/pull/6551#discussion_r32668471 --- Diff: sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala --- @@ -39,6 +39,16 @@ class SQLQuerySuite extends QueryTest with BeforeAndAfterAll with SQLTestUtils { val sqlContext = TestSQLContext import sqlContext.implicits._ + test("SPARK-8010: promote numeric to string") { + val df = Seq((1, 1)).toDF("key", "value") + df.registerTempTable("src") + val queryCaseWhen = sql("select case when true then 1.0 else '1' end from src ") + val queryCoalesce = sql("select coalesce(null, 1, '1') from src ") --- End diff -- Seems Hive will use StringType. I am fine with that.
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