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From Frédéric TERRAZZONI (JIRA) <j...@apache.org>
Subject [jira] [Updated] (HIVE-8359) Map containing null values are not correctly written in Parquet files
Date Mon, 06 Oct 2014 17:25:34 GMT

     [ https://issues.apache.org/jira/browse/HIVE-8359?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Frédéric TERRAZZONI updated HIVE-8359:
--------------------------------------
    Attachment: map_null_val.avro

Avro file containing the sample data. To reproduce the issue, just create a Hive table from
this file and issue a 
{code}
CREATE TABLE broken_parquet_table STORED AS PARQUET
AS SELECT * FROM the_avro_table;

SELECT * FROM broken_parquet_table;
{code}

> 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
>    Affects Versions: 0.13.1
>            Reporter: Frédéric TERRAZZONI
>         Attachments: 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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