Eugene Koifman created HIVE-17650:
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Summary: DDLTask.handleRemoveMm() assumes locks not present
Key: HIVE-17650
URL: https://issues.apache.org/jira/browse/HIVE-17650
Project: Hive
Issue Type: Sub-task
Components: Transactions
Reporter: Eugene Koifman
This moves every file in the table from under delta_x_x/ to root of the
table/partition
How would this work for bucketed tables? Will it create bucket_x_copy_N files?
This could create 1000s of copy_N files - this will likely break something
The comments in the method assume locks are present - this would imply that
there are appropriate Read/WriteEntity objects already created - I doubt this
is the case for a table property change.
It seems like this kind of op should require an Exclusive lock at table level
to prevent concurrent inserts (into new delta_x_x/)
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