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From Ádám Szita (Jira) <j...@apache.org>
Subject [jira] [Updated] (HIVE-25360) Iceberg vectorized ORC reads don't support column reordering
Date Wed, 21 Jul 2021 09:40:00 GMT

     [ https://issues.apache.org/jira/browse/HIVE-25360?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ádám Szita updated HIVE-25360:
------------------------------
    Description: 
HIVE-25256 added support for Iceberg backed tables to support CHANGE COLUMN statement. These
include type, name and order changes to the schema. Native ORC tables only support renames,
but with the help of Iceberg as an intermediary table format layer, this can be achieved,
and works well for non-vectorized reads already.

We should adjust the vectorized read path to support the same.

> Iceberg vectorized ORC reads don't support column reordering
> ------------------------------------------------------------
>
>                 Key: HIVE-25360
>                 URL: https://issues.apache.org/jira/browse/HIVE-25360
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Ádám Szita
>            Assignee: Ádám Szita
>            Priority: Major
>
> HIVE-25256 added support for Iceberg backed tables to support CHANGE COLUMN statement.
These include type, name and order changes to the schema. Native ORC tables only support renames,
but with the help of Iceberg as an intermediary table format layer, this can be achieved,
and works well for non-vectorized reads already.
> We should adjust the vectorized read path to support the same.



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