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https://issues.apache.org/jira/browse/HIVE-13068?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15254512#comment-15254512
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Jesus Camacho Rodriguez commented on HIVE-13068:
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I correct myself: I think it will make a performance difference if we fold the
CAST in SemanticAnalyzer, as we can perform it as we create the expressions...
I will try to move the logic there and submit a new patch.
I will explore further the other two issues.
> Disable Hive ConstantPropagate optimizer when CBO has optimized the plan II
> ---------------------------------------------------------------------------
>
> Key: HIVE-13068
> URL: https://issues.apache.org/jira/browse/HIVE-13068
> Project: Hive
> Issue Type: Sub-task
> Components: CBO, Logical Optimizer
> Affects Versions: 2.1.0
> Reporter: Jesus Camacho Rodriguez
> Assignee: Jesus Camacho Rodriguez
> Attachments: HIVE-13068.01.patch, HIVE-13068.01.patch,
> HIVE-13068.patch
>
>
> After HIVE-12543 went in, we need follow-up work to disable the last call to
> ConstantPropagate in Hive. This probably implies work on extending the
> constant folding logic in Calcite.
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