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From "Vineet Garg (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-16367) Null-safe equality <=> operator is not support with CBO
Date Tue, 04 Apr 2017 00:27:41 GMT
Vineet Garg created HIVE-16367:
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             Summary: Null-safe equality <=> operator is not support with CBO 
                 Key: HIVE-16367
                 URL: https://issues.apache.org/jira/browse/HIVE-16367
             Project: Hive
          Issue Type: Improvement
            Reporter: Vineet Garg
            Assignee: Vineet Garg


Calcite doesn't support such equality operator so hive bails out and goes through non-cbo
path. This could restrict such operators with subqueries and other cbo only features.

Since {{<=>}} is equivalent to {{is not distinct from}} (HIVE-15986) we can rewrite
{{<=>}} to {{is not distinct from}} and enable CBO.



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