HIVE-24445: Non blocking DROP TABLE implementation #2772
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DongWei-4
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…eviewed by Karen Coppage, Peter Vary) Closes apache#2772
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…eviewed by Karen Coppage, Peter Vary) Closes apache#2772
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What changes were proposed in this pull request?
This changes the drop table operation to asynchronous. The data files of dropped table will not be removed right away, but they are going to be cleaned up later by the Compactor/Cleaner.
Why are the changes needed?
This along with a few other changes will enable us to implement lockless reads, which provides perf boost to the transactional tables.
Does this PR introduce any user-facing change?
No
How was this patch tested?
Unit tests
Previous PR closed due to staleness: #2020