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https://issues.apache.org/jira/browse/HIVE-13068?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15261863#comment-15261863
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Jesus Camacho Rodriguez commented on HIVE-13068:
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[~ashutoshc], I think patch is ready to review; probably I will need to update
a few files when QA comes back.
I extended current logic to cover major regressions, but I left four issues for
the follow-up, as the patch was growing rather large and they seem independent
extensions to this work:
- Transform NVL to CASE (HIVE-13637). Regression can be seen in
constantPropWhen.q
- Rule to pull up constants through Limit (HIVE-13638). Regression can be seen
in input26.q
- Rule to pull up constants through Union (HIVE-13639). Regression can be seen
in union_view.q
- Bring PartitionConditionRemover to Calcite (HIVE-13640). Regression can be
seen in index_auto_unused.q
In turn, the extensions that I added to HiveRexUtil will be in Calcite 1.8.0
(CALCITE-1220), thus it will be removed once we upgrade to the newest Calcite
version.
> 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-13068.02.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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