[
https://issues.apache.org/jira/browse/HIVE-12393?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Sergey Shelukhin updated HIVE-12393:
------------------------------------
Target Version/s: (was: 2.0.0)
> Simplify ColumnPruner when CBO optimizes the query
> --------------------------------------------------
>
> Key: HIVE-12393
> URL: https://issues.apache.org/jira/browse/HIVE-12393
> Project: Hive
> Issue Type: Bug
> Components: Logical Optimizer
> Affects Versions: 2.0.0
> Reporter: Jesus Camacho Rodriguez
> Assignee: Jesus Camacho Rodriguez
>
> The plan for any given query optimized by CBO will always contain a Project
> operator on top of the TS that prunes that columns that are not needed.
> Thus, there is no need for Hive optimizer to traverse the whole plan to check
> which columns can be pruned. In fact, Hive ColumnPruner optimizer only needs
> to match TS operators when CBO optimized the plan.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
