francis0407 commented on a change in pull request #24321: [SPARK-27411][SQL]
DataSourceV2Strategy should not eliminate subquery
URL: https://github.com/apache/spark/pull/24321#discussion_r273425352
##########
File path:
sql/core/src/test/scala/org/apache/spark/sql/sources/v2/DataSourceV2Suite.scala
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@@ -392,6 +392,16 @@ class DataSourceV2Suite extends QueryTest with
SharedSQLContext {
}
}
}
+
+ test("SPARK-27411: DataSourceV2Strategy should not eliminate subquery") {
+ val t2 = spark.read.format(classOf[SimpleDataSourceV2].getName).load()
+ sql("create temporary view t1 (a int) using parquet")
+ val df = t2.where("i < (select max(a) from t1)")
+ val subqueries = df.queryExecution.executedPlan.collect {
+ case p => p.subqueries
+ }.flatten
+ assert(subqueries.length == 1)
Review comment:
Sure, thanks.
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