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From Sergio Peña (JIRA) <j...@apache.org>
Subject [jira] [Commented] (HIVE-8359) Map containing null values are not correctly written in Parquet files
Date Tue, 18 Nov 2014 15:54:34 GMT

    [ https://issues.apache.org/jira/browse/HIVE-8359?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14216336#comment-14216336
] 

Sergio Peña commented on HIVE-8359:
-----------------------------------

Thanks [~mickaellcr].

Sorry for the confusion. I did not see you uploaded another patch here. 
I just added two extra lines to the patch you uploaded. I will integrate your fixes there,
and upload the patch again.

> 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, HIVE-8359.2.patch, HIVE-8359.4.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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