Eugene Koifman created HIVE-19569:
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Summary: alter table db1.t1 rename db2.t2 generates
MetaStoreEventListener.onDropTable()
Key: HIVE-19569
URL: https://issues.apache.org/jira/browse/HIVE-19569
Project: Hive
Issue Type: Bug
Components: Metastore, Standalone Metastore, Transactions
Affects Versions: 3.0.0
Reporter: Eugene Koifman
When renaming a table within the same DB, this operation causes
{{MetaStoreEventListener.onAlterTable()}} to fire but when changing DB name for
a table it causes {{MetaStoreEventListener.onDropTable()}} +
{{MetaStoreEventListener.onCreateTable()}}.
The files from original table are moved to new table location.
This creates confusing semantics since any logic in {{onDropTable()}} doesn't
know about the larger context, i.e. that there will be a matching
{{onCreateTable()}}.
In particular, this causes a problem for Acid tables since files moved from old
table use WriteIDs that are not meaningful with the context of new table.
Current implementation is due to replication. This should ideally be changed
to raise a "not supported" error for tables that are marked for replication.
cc [~sankarh]
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