dongjoon-hyun commented on code in PR #56842:
URL: https://github.com/apache/spark/pull/56842#discussion_r3487415235


##########
sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/InMemoryColumnarQuerySuite.scala:
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@@ -222,6 +222,36 @@ class InMemoryColumnarQuerySuite extends 
SharedSparkSession with AdaptiveSparkPl
     }
   }
 
+  test("cache nanosecond-precision timestamp types") {
+    withSQLConf(SQLConf.TIMESTAMP_NANOS_TYPES_ENABLED.key -> "true") {
+      Seq("TIMESTAMP_NTZ(9)", "TIMESTAMP_LTZ(9)").foreach { typeName =>
+        Seq("false", "true").foreach { vectorized =>
+          withSQLConf(SQLConf.CACHE_VECTORIZED_READER_ENABLED.key -> 
vectorized) {

Review Comment:
   SQLConf.CACHE_VECTORIZED_READER_ENABLED.key=true seems to be a dead test 
coverage because of the following. Could you double-check, @viirya ?
   
   
https://github.com/apache/spark/blob/64fb953b9f2c868992a37033b068e62387535172/sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/InMemoryRelation.scala#L175-L182



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