Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/12855#discussion_r63466408
--- Diff:
sql/hive/src/test/scala/org/apache/spark/sql/hive/InsertIntoHiveTableSuite.scala
---
@@ -216,6 +215,33 @@ class InsertIntoHiveTableSuite extends QueryTest with
TestHiveSingleton with Bef
sql("DROP TABLE hiveTableWithStructValue")
}
+ test("SPARK-10216: Avoid empty files during overwrite into Hive table
with group by query") {
+ val testDataset = hiveContext.sparkContext.parallelize(
+ (1 to 2).map(i => TestData(i, i.toString))).toDF()
+ testDataset.registerTempTable("testDataset")
+
+ val tmpDir = Utils.createTempDir()
+ sql(
+ s"""
+ |CREATE TABLE table1(key int,value string)
+ |location '${tmpDir.toURI.toString}'
+ """.stripMargin)
+ sql(
+ """
+ |INSERT OVERWRITE TABLE table1
+ |SELECT count(key), value FROM testDataset GROUP BY value
--- End diff --
Ah, yes. Thank you.
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