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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