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https://issues.apache.org/jira/browse/HIVE-18554?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Adam Szita updated HIVE-18554:
------------------------------
    Description: 
In test case {{testMap}} the AssertEquals check was returning a false positive 
result, due to a Parquet bug:

Original types were not asserted in equals method, this has been fixed here: 
[https://github.com/apache/parquet-mr/commit/878ebcd0bc2592fa9d5dda01117c07bc3c40bb33]

What this test would produce after the Parquet fix is this:
{code:java}
expected:<message hive_schema {
 optional group mapCol (MAP) {
  repeated group map (MAP_KEY_VALUE) {
   required binary key;
   optional binary value;
  }
 }
}
> but was:<message hive_schema {
 optional group mapCol (MAP) {
  repeated group map (MAP_KEY_VALUE) {
   required binary key (UTF8);
   optional binary value (UTF8);
  }
 }
}
>{code}
It affects testMapDecimal test case similarly.

Once we upgrade to a Parquet lib with this fix in place our test case will 
produce failure too, hence I propose fixing it now.

  was:
In test case {{testMap}} the AssertEquals check was returning a false positive 
result, due to a Parquet bug:

Original types were not asserted in equals method, this has been fixed here: 
[https://github.com/apache/parquet-mr/commit/878ebcd0bc2592fa9d5dda01117c07bc3c40bb33]

What this test would produce after the Parquet fix is this:
{code:java}
expected:<message hive_schema {
 optional group mapCol (MAP) {
  repeated group map (MAP_KEY_VALUE) {
   required binary key;
   optional binary value;
  }
 }
}
> but was:<message hive_schema {
 optional group mapCol (MAP) {
  repeated group map (MAP_KEY_VALUE) {
   required binary key (UTF8);
   optional binary value (UTF8);
  }
 }
}
>{code}
Once we upgrade to a Parquet lib with this fix in place our test case will 
produce failure too, hence I propose fixing it now.


> Fix false positive test ql.io.parquet.TestHiveSchemaConverter.testMap 
> ----------------------------------------------------------------------
>
>                 Key: HIVE-18554
>                 URL: https://issues.apache.org/jira/browse/HIVE-18554
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Adam Szita
>            Assignee: Adam Szita
>            Priority: Major
>         Attachments: HIVE-18554.0.patch
>
>
> In test case {{testMap}} the AssertEquals check was returning a false 
> positive result, due to a Parquet bug:
> Original types were not asserted in equals method, this has been fixed here: 
> [https://github.com/apache/parquet-mr/commit/878ebcd0bc2592fa9d5dda01117c07bc3c40bb33]
> What this test would produce after the Parquet fix is this:
> {code:java}
> expected:<message hive_schema {
>  optional group mapCol (MAP) {
>   repeated group map (MAP_KEY_VALUE) {
>    required binary key;
>    optional binary value;
>   }
>  }
> }
> > but was:<message hive_schema {
>  optional group mapCol (MAP) {
>   repeated group map (MAP_KEY_VALUE) {
>    required binary key (UTF8);
>    optional binary value (UTF8);
>   }
>  }
> }
> >{code}
> It affects testMapDecimal test case similarly.
> Once we upgrade to a Parquet lib with this fix in place our test case will 
> produce failure too, hence I propose fixing it now.



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