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From "Jesus Camacho Rodriguez (JIRA)" <>
Subject [jira] [Commented] (HIVE-11627) Make PPD optimizer run faster
Date Tue, 25 Aug 2015 13:56:46 GMT


Jesus Camacho Rodriguez commented on HIVE-11627:

[~gopalv], could you take a look?

HIVE-11638 will solve the problem with the degradation of the hashmap performance. In addition,
this patch will reduce the number of calls to the {{get}} method of the hashmap to 1/3 of
the original number.

> Make PPD optimizer run faster
> -----------------------------
>                 Key: HIVE-11627
>                 URL:
>             Project: Hive
>          Issue Type: Improvement
>          Components: Logical Optimizer
>    Affects Versions: 1.3.0, 2.0.0
>            Reporter: Jesus Camacho Rodriguez
>            Assignee: Jesus Camacho Rodriguez
>         Attachments: HIVE-11627.patch
> We retrieve the ExprInfo from the map each time we want to change any of its properties.
Instead, the number of calls to the map could be drastically reduced by retrieving the ExprInfo
once, and changing all its properties.

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