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https://issues.apache.org/jira/browse/HIVE-13980?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15593494#comment-15593494
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Eugene Koifman commented on HIVE-13980:
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cc [~sershe] - maybe CTAS does work....
> create table as select should acquire X lock on target table
> ------------------------------------------------------------
>
> Key: HIVE-13980
> URL: https://issues.apache.org/jira/browse/HIVE-13980
> Project: Hive
> Issue Type: Bug
> Components: Transactions
> Affects Versions: 1.0.0
> Reporter: Eugene Koifman
>
> hive> create table test.dummy as select * from oraclehadoop.dummy;
> This acquires SHARED_READ on oraclehadoop.dummy table and SHARED_READ on
> _test_ database.
> The effect is that you can drop _test.dummy_ from another session while the
> insert is still in progress.
> This operation is a bit odd in that it combines a DDL operation which is not
> transactional with a DML operation which is.
> If it were to fail in the middle, the target table would remain. This can't
> be fixed easily but we should get an X lock on _test.dummy_.
> The workaround is to split this into 2 commands
> 1. create table
> 2. perform insert
>
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