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Date: Mon, 11 Jul 2016 17:24:11 +0000 (UTC)
From: "Naveen Gangam (JIRA)" <jira@apache.org>
To: issues@hive.apache.org
Message-ID: <JIRA.12984377.1467121114000.80476.1468257851126@Atlassian.JIRA>
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References: <JIRA.12984377.1467121114000@Atlassian.JIRA> <JIRA.12984377.1467121114584@arcas>
Subject: [jira] [Resolved] (HIVE-14116) TBLPROPERTIES does not allow empty
 string values when Metastore is backed by Oracle database.
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archived-at: Mon, 11 Jul 2016 17:24:12 -0000


     [ https://issues.apache.org/jira/browse/HIVE-14116?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Naveen Gangam resolved HIVE-14116.
----------------------------------
       Resolution: Duplicate
         Assignee: Naveen Gangam
    Fix Version/s: 1.0.0

This appears to have been resolved via HIVE-8485. Please set {{hive.metastore.orm.retrieveMapNullsAsEmptyStrings=true}} in the hive configuration to get around this issue.
I have verified this with for the usecase in this jira. Closing this jira as duplicate. Please re-open if you have questions or concerns. Thanks 

> TBLPROPERTIES does not allow empty string values when Metastore is backed by Oracle database.
> ---------------------------------------------------------------------------------------------
>
>                 Key: HIVE-14116
>                 URL: https://issues.apache.org/jira/browse/HIVE-14116
>             Project: Hive
>          Issue Type: Bug
>          Components: Metastore
>    Affects Versions: 1.1.0
>            Reporter: Tony Hill
>            Assignee: Naveen Gangam
>             Fix For: 1.0.0
>
>
> DDL commands like:
> ALTER TABLE test SET TBLPROPERTIES('serialization.null.format'='');
> are silently ignored if the database backing Metastore is Oracle. This appears to be because Oracle treats an empty string as null.
> Unlike when using MySql, no entry is created in the TBL_PARAMS table.
> Steps to reproduce:
> Create a table with a string field.
> eg table mytable, field mystringfield.
> ALTER TABLE mytable SET TBLPROPERTIES('serialization.null.format'='');
> DESCRIBE FORMATTED mytable;
> with mysql backed Metastore, the entry will be displayed:
> serialization.null.format 
> and an entry is created in the TBL_PARAMS for the parameter.
> With Oracle backed metastore, it is not, and no entry is created in TBL_PARAMS.


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