okumin commented on code in PR #5777:
URL: https://github.com/apache/hive/pull/5777#discussion_r2053393943


##########
ql/src/test/org/apache/hadoop/hive/ql/udf/generic/TestGenericUDTFGetSQLSchema.java:
##########
@@ -87,9 +87,6 @@ public void testWithSimpleTypes() throws Exception {
 
   @Test
   public void testWithDDL() throws Exception {
-    // Set the execution engine to mr to avoid the NPE exception in stats flow
-    // TODO: HIVE-28618: TestGenericUDTFGetSQLSchema to run on Tez
-    conf.set("hive.execution.engine", "mr");

Review Comment:
   This is a part of [the decommission of Hive on 
MapReduce](https://issues.apache.org/jira/browse/HIVE-28027). In my 
understanding, we've been migrating exceptional test cases that were excluded 
[here](https://github.com/apache/hive/pull/4973/files) only to Tez, which means 
`testWithSimpleTypes` in this file is already not tested with MR. It is also 
not an unfair proposal to keep MR test cases as long as MR is not removed! In 
my personal opinion, we don't have CI power to test every feature on the 
deprecated MapReduce.
   
   @abstractdog Do you have a suggestion about the work under the umbrella?



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