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https://issues.apache.org/jira/browse/HIVE-8359?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14211431#comment-14211431
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Ryan Blue commented on HIVE-8359:
---------------------------------
Thanks, Brock. De-duplicating this and HIVE-6994 is on my list of to-do items
for today. I really like the tests that Sergio has put together for this, but I
still need to see what Mickael has done that isn't done by Sergio's patch. I
think it would be good if we all looked over both and then discussed what is
needed for both of them.
> Map containing null values are not correctly written in Parquet files
> ---------------------------------------------------------------------
>
> Key: HIVE-8359
> URL: https://issues.apache.org/jira/browse/HIVE-8359
> Project: Hive
> Issue Type: Bug
> Components: File Formats
> Affects Versions: 0.13.1
> Reporter: Frédéric TERRAZZONI
> Assignee: Sergio Peña
> Attachments: HIVE-8359.1.patch, map_null_val.avro
>
>
> Tried write a map<string,string> column in a Parquet file. The table should
> contain :
> {code}
> {"key3":"val3","key4":null}
> {"key3":"val3","key4":null}
> {"key1":null,"key2":"val2"}
> {"key3":"val3","key4":null}
> {"key3":"val3","key4":null}
> {code}
> ... and when you do a query like {code}SELECT * from mytable{code}
> We can see that the table is corrupted :
> {code}
> {"key3":"val3"}
> {"key4":"val3"}
> {"key3":"val2"}
> {"key4":"val3"}
> {"key1":"val3"}
> {code}
> I've not been able to read the Parquet file in our software afterwards, and
> consequently I suspect it to be corrupted.
> For those who are interested, I generated this Parquet table from an Avro
> file.
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