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From "Sergey Shelukhin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-17713) disallow adding/modifying columns in metastore for Avro/CSV/etc. SerDes
Date Thu, 05 Oct 2017 20:47:01 GMT

    [ https://issues.apache.org/jira/browse/HIVE-17713?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16193621#comment-16193621
] 

Sergey Shelukhin commented on HIVE-17713:
-----------------------------------------

cc [~icocio]

cc [~thejas] thoughts?

> disallow adding/modifying columns in metastore for Avro/CSV/etc. SerDes
> -----------------------------------------------------------------------
>
>                 Key: HIVE-17713
>                 URL: https://issues.apache.org/jira/browse/HIVE-17713
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Sergey Shelukhin
>
> This is kind of a followup from HIVE-11985
> When a SerDe uses an external schema (either embedded, or via a file link), it's not
using the information stored in metastore for the columns. So, if the users modify table schema
via add column and other such commands it won't have effect on the serde, since it's using
the external schema to figure out what the columns are; leading to confusion and bugs. We
should not allow such a modification for SerDes not in hive.serdes.using.metastore.for.schema




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