Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/14874#discussion_r76932113
--- Diff:
sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLViewSuite.scala
---
@@ -274,6 +276,75 @@ class SQLViewSuite extends QueryTest with SQLTestUtils
with TestHiveSingleton {
}
}
+ test("should not allow ALTER VIEW AS when the view does not exist") {
+ intercept[NoSuchTableException](
+ sql("ALTER VIEW testView AS SELECT 1, 2")
+ )
+
+ intercept[NoSuchTableException](
+ sql("ALTER VIEW default.testView AS SELECT 1, 2")
+ )
+ }
+
+ test("ALTER VIEW AS should try to alter temp view first if view name has
no database part") {
+ withTempView("test_view") {
+ withView("test_view") {
+ sql("CREATE VIEW test_view AS SELECT 1 AS a, 2 AS b")
+ sql("CREATE TEMP VIEW test_view AS SELECT 1 AS a, 2 AS b")
+
+ sql("ALTER VIEW test_view AS SELECT 3 AS i, 4 AS j")
+
+ // The temporary view should be updated.
+ checkAnswer(spark.table("test_view"), Row(3, 4))
+
+ // The permanent view should stay same.
+ checkAnswer(spark.table("default.test_view"), Row(1, 2))
+ }
+ }
+ }
+
+ test("ALTER VIEW AS should alter permanent view if view name has
database part") {
+ withTempView("test_view") {
+ withView("test_view") {
--- End diff --
Based on my understanding, this will drop the temporary view because the
resolution preference of `drop view` and then `withTempView` is unable to find
any temporary view.
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