hive-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Harish Butani (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-6439) Introduce CBO step in Semantic Analyzer
Date Tue, 24 Jun 2014 21:42:25 GMT

     [ https://issues.apache.org/jira/browse/HIVE-6439?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Harish Butani updated HIVE-6439:
--------------------------------

    Resolution: Invalid
        Status: Resolved  (was: Patch Available)

This has been invalidated by the creation of the cbo branch.

> Introduce CBO step in Semantic Analyzer
> ---------------------------------------
>
>                 Key: HIVE-6439
>                 URL: https://issues.apache.org/jira/browse/HIVE-6439
>             Project: Hive
>          Issue Type: Sub-task
>            Reporter: Harish Butani
>            Assignee: Harish Butani
>         Attachments: HIVE-6439.1.patch, HIVE-6439.2.patch, HIVE-6439.4.patch, HIVE-6439.5.patch
>
>
> This patch introduces CBO step in SemanticAnalyzer. For now the CostBasedOptimizer is
an empty shell. 
> The contract between SemAly and CBO is:
> - CBO step  is controlled by the 'hive.enable.cbo.flag'. 
> - When true Hive SemAly will hand CBO a Hive Operator tree (with operators annotated
with stats). If it can CBO will return a better plan in Hive AST form.



--
This message was sent by Atlassian JIRA
(v6.2#6252)

Mime
View raw message