Matt McCline created HIVE-20294:
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             Summary: Vectorization: Fix NULL / Wrong Results issues in 
COALESCE / ELT
                 Key: HIVE-20294
                 URL: https://issues.apache.org/jira/browse/HIVE-20294
             Project: Hive
          Issue Type: Bug
          Components: Hive
            Reporter: Matt McCline
            Assignee: Matt McCline


Write new UT tests that use random data and intentional isRepeating batches to 
checks for NULL and Wrong Results for vectorized COALESCE and ELT.

Also, add tests for ARRAY and MAP indexing, IS [NOT] NULL and NOT



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