Todd Lipcon created HIVE-21750:
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Summary: INSERT OVERWRITE with empty result set does not clear
transactional table
Key: HIVE-21750
URL: https://issues.apache.org/jira/browse/HIVE-21750
Project: Hive
Issue Type: Bug
Components: Hive
Affects Versions: 4.0.0
Reporter: Todd Lipcon
The following query:
{code}
INSERT OVERWRITE TABLE t SELECT 1 WHERE FALSE
{code}
should serve to truncate a table by producing an empty base data directory. In
fact no new base directory is created, so the table is not cleared. (at least
with an insert_only table, I didn't test full-ACID)
This bug does not seem to happen with non-transactional tables.
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