Jason Dere created HIVE-17482:
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Summary: External LLAP client: acquire locks for tables queried
directly by LLAP
Key: HIVE-17482
URL: https://issues.apache.org/jira/browse/HIVE-17482
Project: Hive
Issue Type: Sub-task
Components: llap
Reporter: Jason Dere
Assignee: Jason Dere
When using the LLAP external client with simple queries (filter/project of
single table), the appropriate locks should be taken on the table being read
like they are for normal Hive queries. This is important in the case of
transactional tables being queried, since the compactor relies on the presence
of table locks to determine whether it can safely delete old versions of
compacted files without affecting currently running queries.
This does not have to happen in the complex query case, since a query is used
(with the appropriate locking mechanisms) to create/populate the temp table
holding the results to the complex query.
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