Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/17935#discussion_r116165542
--- Diff: sql/core/src/test/scala/org/apache/spark/sql/SubquerySuite.scala
---
@@ -868,6 +868,29 @@ class SubquerySuite extends QueryTest with
SharedSQLContext {
Row(3, 3.0, 2, 3.0) :: Row(3, 3.0, 2, 3.0) :: Nil)
}
+ test("SPARK-20690: Do not add missing attributes through subqueries") {
+ withTempView("onerow") {
+ Seq(1).toDF("c1").createOrReplaceTempView("onerow")
+
+ val e = intercept[AnalysisException] {
+ sql(
+ """
+ | select 1
+ | from (select 1 from onerow t1 LIMIT 1)
--- End diff --
https://cwiki.apache.org/confluence/display/Hive/LanguageManual+SubQueries
> Hive supports subqueries only in the FROM clause (through Hive 0.12). The
subquery has to be given a name because every table in a FROM clause must have
a name.
Hive also requires an alias name.
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