Peter Varga created HIVE-23671:
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Summary: MSCK repair should handle transactional tables in certain
usecases
Key: HIVE-23671
URL: https://issues.apache.org/jira/browse/HIVE-23671
Project: Hive
Issue Type: Improvement
Components: Metastore
Reporter: Peter Varga
Assignee: Peter Varga
The MSCK REPAIR tool does not handle transactional tables too well. It can find
and add new partitions the same way as for non-transactional tables, but since
the writeId differences are not handled, the data can not read back from the
new partitions.
We could handle some usecases when the writeIds in the HMS and the underlying
data are not conflicting. If the HMS does not contains allocated writes for the
table we can seed the table with the writeIds read from the directory
structrure.
Real life use cases could be:
* Copy data files from one cluster to another with different HMS, create the
table and call MSCK REPAIR
* If the HMS db is lost, recreate the table and call MSCK REPAIR
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