Denys Kuzmenko created HIVE-27160:
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Summary: Iceberg: Optimise delete (entire) data from table
Key: HIVE-27160
URL: https://issues.apache.org/jira/browse/HIVE-27160
Project: Hive
Issue Type: Task
Reporter: Denys Kuzmenko
Currently, in MOR mode, Hive creates "positional delete" files during deletes.
With "Delete from ", the entire dataset in the table or partition is written as
a "positional delete" file.
During the read operation, all these files are read again causing huge delay.
Proposal: apply "truncate" optimization in case of "delete *".
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