Github user mallman commented on a diff in the pull request:

    https://github.com/apache/spark/pull/13818#discussion_r68064203
  
    --- Diff: 
sql/hive/src/test/scala/org/apache/spark/sql/hive/parquetSuites.scala ---
    @@ -425,6 +425,28 @@ class ParquetMetastoreSuite extends 
ParquetPartitioningTest {
         }
       }
     
    +  test("SPARK-15968: nonempty partitioned metastore Parquet table lookup 
should use cached " +
    --- End diff --
    
    I looked in `CachedTableSuite`. I'm not sure that's a good place for this 
kind of test. That test suite seems focused on testing tables cached by the 
[CacheManager](https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/execution/CacheManager.scala).
 This patch is focused on table caching in 
[HiveMetastoreCatalog](https://github.com/apache/spark/blob/master/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveMetastoreCatalog.scala).
    
    It's difficult to find the best place for these kinds of caching tests. I 
chose this file because it already had some of these tests. Perhaps 
[HiveMetastoreCatalogSuite](https://github.com/apache/spark/blob/master/sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveMetastoreCatalogSuite.scala)
 would be a good candidate for an alternative?


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