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From "Julian Hyde (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-11918) Implement/Enable constant related optimization rules in Calcite
Date Tue, 29 Sep 2015 18:48:04 GMT

    [ https://issues.apache.org/jira/browse/HIVE-11918?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14935624#comment-14935624
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Julian Hyde commented on HIVE-11918:
------------------------------------

[~pxiong], I have a tentative fix for CALCITE-902 in https://github.com/julianhyde/incubator-calcite/commit/9adf259763a9c52a6db8d4a19425722fbedcaa6c.
See whether this fix improves things in Hive.

> Implement/Enable constant related optimization rules in Calcite
> ---------------------------------------------------------------
>
>                 Key: HIVE-11918
>                 URL: https://issues.apache.org/jira/browse/HIVE-11918
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Pengcheng Xiong
>            Assignee: Pengcheng Xiong
>
> Right now, Hive optimizer (Calcite) is short of the constant related optimization rules.
For example, constant folding, constant propagation and constant transitive rules. Although
Hive later provides those rules in the logical optimizer, we would like to implement those
inside Calcite. This will benefit the current optimization as well as the optimization based
on return path that we are planning to use in the future. This JIRA is the umbrella JIRA to
implement/enable those rules.



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