[jira] [Commented] (HIVE-20598) Fix typos in HiveAlgorithmsUtil calculations

["Zoltan Haindrich (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-20598?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16620594#comment-16620594 ] 

Zoltan Haindrich commented on HIVE-20598:
-----------------------------------------

there were a few more...in which cases it might have multiplied by 0

> Fix typos in HiveAlgorithmsUtil calculations
> --------------------------------------------
>
>                 Key: HIVE-20598
>                 URL: https://issues.apache.org/jira/browse/HIVE-20598
>             Project: Hive
>          Issue Type: Bug
>          Components: Logical Optimizer
>            Reporter: Zoltan Haindrich
>            Assignee: Zoltan Haindrich
>            Priority: Major
>         Attachments: HIVE-20598.01.patch
>
>
> HIVE-10343 have made the costs changeable by hiveconf settings; however there was a method in which there was already a local variable named cpuCost....bottom line is the cost of n-way joins calculated by this method is computed as the product of the number of rows...
> https://github.com/apache/hive/blob/9c907769a63a6b23c91fdf0b3f3d0aa6387035dc/ql/src/java/org/apache/hadoop/hive/ql/optimizer/calcite/cost/HiveAlgorithmsUtil.java#L83



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