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Jesus Camacho Rodriguez commented on HIVE-13942: ------------------------------------------------ [~ashutoshc], could you take a look? I went through the golden file changes and these are correct. Thanks > Correctness of CASE folding in the presence of NULL values > ---------------------------------------------------------- > > Key: HIVE-13942 > URL: https://issues.apache.org/jira/browse/HIVE-13942 > Project: Hive > Issue Type: Sub-task > Components: CBO > Affects Versions: 2.2.0, 2.1.1 > Reporter: Jesus Camacho Rodriguez > Assignee: Jesus Camacho Rodriguez > Attachments: HIVE-13942.patch > > > Introduced in HIVE-13068. > {{(case when key<'90' then 2 else 4 end) > 3}} should not fold to {{key >= > '90'}}, as these two expressions are not equivalent for _null_ values. > Instead, it should fold to {{not NVL((key < '90'),false)}}. > This is caused by 1) some methods still calling original _RexUtil.simplify_ > method, and 2) further improvements needed in _HiveRexUtil.simplify_. -- This message was sent by Atlassian JIRA (v6.3.4#6332)