Github user gatorsmile commented on the pull request:
https://github.com/apache/spark/pull/9055#issuecomment-168152168
Found a related HIVE JIRA to support the left anti join:
https://issues.apache.org/jira/browse/HIVE-12519
However, their proposed solution has a hole. Anyway, if we can support the
anti join at the run time, it is much efficient.
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