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https://issues.apache.org/jira/browse/HIVE-11927?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15028102#comment-15028102
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Laljo John Pullokkaran commented on HIVE-11927:
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[~pxiong] I looked at the patch:
1. Patch has bunch of print statements
2. ReduceExpressions for filter (select x from r1 where false ) will generate
an empty logical value list (i.e null scan) instead of TS. ASTConverter needs
to handle this. I.e translate "NULL SCAN" to table "dual"
> Implement/Enable constant related optimization rules in Calcite: enable
> HiveReduceExpressionsRule to fold constants
> -------------------------------------------------------------------------------------------------------------------
>
> Key: HIVE-11927
> URL: https://issues.apache.org/jira/browse/HIVE-11927
> Project: Hive
> Issue Type: Sub-task
> Reporter: Pengcheng Xiong
> Assignee: Pengcheng Xiong
> Attachments: HIVE-11927.01.patch, HIVE-11927.02.patch,
> HIVE-11927.03.patch, HIVE-11927.04.patch, HIVE-11927.05.patch,
> HIVE-11927.06.patch, HIVE-11927.07.patch, HIVE-11927.08.patch
>
>
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