Github user yhuai commented on a diff in the pull request:
https://github.com/apache/spark/pull/15459#discussion_r83476207
--- Diff:
sql/hive/src/test/scala/org/apache/spark/sql/hive/MetastoreRelationSuite.scala
---
@@ -36,4 +38,16 @@ class MetastoreRelationSuite extends SparkFunSuite {
// No exception should be thrown
relation.toJSON
}
+
+ test("SPARK-17409: Do Not Optimize Query in CTAS More Than Once") {
+ withTable("bar") {
+ withTempView("foo") {
+ sql("select 0 as id").createOrReplaceTempView("foo")
+ sql("CREATE TABLE bar AS SELECT * FROM foo group by id")
--- End diff --
Also put the comment of
https://github.com/apache/spark/pull/15459/files#diff-5d2ebf4e9ca5a990136b276859769289R1626
at here? Also mention that this test is for hive format table?
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