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From "Naveen Gangam (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-12362) Hive's Parquet SerDe ignores 'serialization.null.format' property
Date Wed, 31 Aug 2016 18:27:20 GMT

    [ https://issues.apache.org/jira/browse/HIVE-12362?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15452978#comment-15452978
] 

Naveen Gangam commented on HIVE-12362:
--------------------------------------


[~lskuff] I have not done any performance testing on this. Just tested the usecase manually
and with a qtest. Do you have a testcase to reproduce the performance issue? Thanks

> Hive's Parquet SerDe ignores 'serialization.null.format' property
> -----------------------------------------------------------------
>
>                 Key: HIVE-12362
>                 URL: https://issues.apache.org/jira/browse/HIVE-12362
>             Project: Hive
>          Issue Type: Bug
>          Components: Hive
>    Affects Versions: 1.1.0
>            Reporter: Naveen Gangam
>            Assignee: Naveen Gangam
>         Attachments: HIVE-12362.2.patch, HIVE-12362.patch
>
>
> {code}
> create table src (a string);
> insert into table src values (NULL), (''), ('');
> 0: jdbc:hive2://localhost:10000/default> select * from src;
> +-----------+--+
> | src.a  |
> +-----------+--+
> | NULL      |
> |                |
> |                |
> +-----------+--+
> create table dest (a string) row format serde 'org.apache.hadoop.hive.ql.io.parquet.serde.ParquetHiveSerDe'
stored as INPUTFORMAT 'org.apache.hadoop.hive.ql.io.parquet.MapredParquetInputFormat' OUTPUTFORMAT
'org.apache.hadoop.hive.ql.io.parquet.MapredParquetOutputFormat';
> alter table dest set SERDEPROPERTIES ('serialization.null.format' = '');
> alter table dest set TBLPROPERTIES ('serialization.null.format' = '');
> insert overwrite table dest select * from src;
> 0: jdbc:hive2://localhost:10000/default> select * from test11;
> +-----------+--+
> | test11.a  |
> +-----------+--+
> | NULL      |
> |                |
> |                |
> +-----------+--+
> {code}



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