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Posted to dev@hive.apache.org by "Ayush Saxena (Jira)" <ji...@apache.org> on 2022/02/26 13:47:00 UTC

[jira] [Created] (HIVE-25990) Optimise multiple copies in case of CTAS in external tables for Object stores

Ayush Saxena created HIVE-25990:
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             Summary: Optimise multiple copies in case of CTAS in external tables for Object stores
                 Key: HIVE-25990
                 URL: https://issues.apache.org/jira/browse/HIVE-25990
             Project: Hive
          Issue Type: Improvement
            Reporter: Ayush Saxena
            Assignee: Ayush Saxena


Presently for CTAS with external tables, there are two renames, operations, one from tmp to _ext and then from _ext to actual target.
In case of object stores, the renames lead to actual copy. Avoid renaming by avoiding rename from tmp to _ext, but by creating a list of files to be copied in that directly, which can be consumed in the move task, to copy directly from tmp to actual target.



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