hive-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "jiraposter@reviews.apache.org (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-1989) recognize transitivity of predicates on join keys
Date Thu, 04 Aug 2011 21:27:30 GMT

    [ https://issues.apache.org/jira/browse/HIVE-1989?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13079607#comment-13079607
] 

jiraposter@reviews.apache.org commented on HIVE-1989:
-----------------------------------------------------


-----------------------------------------------------------
This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/1228/
-----------------------------------------------------------

(Updated 2011-08-04 21:26:16.036333)


Review request for hive.


Changes
-------

Fix "bugs" field


Summary
-------

https://issues.apache.org/jira/browse/HIVE-1989


This addresses bug HIVE-1989.
    https://issues.apache.org/jira/browse/HIVE-1989


Diffs
-----

  http://svn.apache.org/repos/asf/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/optimizer/ColumnPrunerProcFactory.java
1152395 
  http://svn.apache.org/repos/asf/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/ppd/OpProcFactory.java
1152395 

Diff: https://reviews.apache.org/r/1228/diff


Testing
-------


Thanks,

Charles



> recognize transitivity of predicates on join keys
> -------------------------------------------------
>
>                 Key: HIVE-1989
>                 URL: https://issues.apache.org/jira/browse/HIVE-1989
>             Project: Hive
>          Issue Type: Improvement
>          Components: Query Processor
>    Affects Versions: 0.6.0
>            Reporter: John Sichi
>            Assignee: Charles Chen
>         Attachments: HIVE-1989v1.patch
>
>
> Given
> {noformat}
> set hive.mapred.mode=strict;
> create table invites (foo int, bar string) partitioned by (ds string);
> create table invites2 (foo int, bar string) partitioned by (ds string);
> select count(*) from invites join invites2 on invites.ds=invites2.ds where invites.ds='2011-01-01';
> {noformat}
> currently an error occurs:
> {noformat}
> Error in semantic analysis: No Partition Predicate Found for Alias "invites2" Table "invites2"
> {noformat}
> The optimizer should be able to infer a predicate on invites2 via transitivity.  The
current lack places a burden on the user to add a redundant predicate, and makes impossible
(at least in strict mode) join views where both underlying tables are partitioned (the join
select list has to pick one of the tables arbitrarily).

--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira

        

Mime
View raw message