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https://issues.apache.org/jira/browse/HIVE-4655?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13675103#comment-13675103
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Jitendra Nath Pandey commented on HIVE-4655:
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Review board entry.
https://reviews.apache.org/r/11634/
> Vectorization not working with negative constants, hive doesn't fold
> constants.
> -------------------------------------------------------------------------------
>
> Key: HIVE-4655
> URL: https://issues.apache.org/jira/browse/HIVE-4655
> Project: Hive
> Issue Type: Sub-task
> Reporter: Jitendra Nath Pandey
> Assignee: Jitendra Nath Pandey
> Fix For: vectorization-branch
>
> Attachments: HIVE-4655.1.patch
>
>
> Hive optimizer doesn't fold the constants, however vectorized code path
> assumes that constants have been folded. This should be fixed in hive
> optimizer.
> In this jira we just fix vectorization path to handle folding for negative
> constants. This is needed because hive plan treats negative constants as
> unary-minus expression on constants, therefore these expressions also need
> constant folding.
> This fix will become redundant once constant folding is appropriately
> implemented in hive optimizer. (HIVE-746)
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