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Posted to dev@drill.apache.org by "Sean Hsuan-Yi Chu (JIRA)" <ji...@apache.org> on 2016/03/05 00:22:41 UTC

[jira] [Created] (DRILL-4476) Enhance Union-All operator for dealing with empty left input or empty both inputs

Sean Hsuan-Yi Chu created DRILL-4476:
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             Summary: Enhance Union-All operator for dealing with empty left input or empty both inputs
                 Key: DRILL-4476
                 URL: https://issues.apache.org/jira/browse/DRILL-4476
             Project: Apache Drill
          Issue Type: Bug
          Components: Execution - Relational Operators
            Reporter: Sean Hsuan-Yi Chu
            Assignee: Sean Hsuan-Yi Chu


Union-All operator does not deal with the situation where left side comes from empty source.

Due to DRILL-2288's enhancement for empty sources, Union-All operator now can be allowed to support this scenario.



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