coderex2522 commented on code in PR #1089:
URL: https://github.com/apache/orc/pull/1089#discussion_r852556124


##########
c++/test/TestWriter.cc:
##########
@@ -1996,5 +1996,5 @@ namespace orc {
     }
   }
 
-  INSTANTIATE_TEST_CASE_P(OrcTest, WriterTest, Values(FileVersion::v_0_11(), 
FileVersion::v_0_12()));
+  INSTANTIATE_TEST_CASE_P(OrcTest, WriterTest, Values(FileVersion::v_0_11(), 
FileVersion::v_0_12(), FileVersion::UNSTABLE_PRE_2_0()));

Review Comment:
   > Should we generate some ORC files and add some test cases for 
cross-language compatibility? We have had issues when Java ORC reader cannot 
understand bloom filter produced by the C++ writer (which is caught by 
@stiga-huang). We may be safely assured when test cases report that the Java 
ORC reader can correctly read UNSTABLE_PRE_2_0 file created by the C++ ORC 
writer and vice versa. @dongjoon-hyun @stiga-huang @coderex2522
   
   The [PR](https://github.com/apache/orc/pull/1062) has been tested using c++ 
ORC reader to read UNSTABLE_PRE_2_0 file created by the java ORC writer, so 
here only adds the test about java reader reads the file written by c++ writer.



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