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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-3070) Filter on outer join condition removed while merging join tree
Date Sat, 21 Jul 2012 09:42:34 GMT

    [ https://issues.apache.org/jira/browse/HIVE-3070?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13419781#comment-13419781
] 

Hudson commented on HIVE-3070:
------------------------------

Integrated in Hive-trunk-h0.21 #1557 (See [https://builds.apache.org/job/Hive-trunk-h0.21/1557/])
    HIVE-3070 Filter on outer join condition removed while merging join tree
(Navis via namit) (Revision 1364037)

     Result = FAILURE
namit : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1364037
Files : 
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/parse/SemanticAnalyzer.java
* /hive/trunk/ql/src/test/queries/clientpositive/mergejoins.q
* /hive/trunk/ql/src/test/results/clientpositive/mergejoins.q.out

                
> Filter on outer join condition removed while merging join tree
> --------------------------------------------------------------
>
>                 Key: HIVE-3070
>                 URL: https://issues.apache.org/jira/browse/HIVE-3070
>             Project: Hive
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 0.8.1, 0.9.0, 0.10.0
>            Reporter: Zhang Xinyu
>            Assignee: Navis
>
> should the result of query A: 
> select s.aa, s.bb, c.key keyc from (select a.key aa, b.key bb from src a left outer join
src b on a.key=b.key) s left outer join src c on s.bb=c.key and s.bb<10 where s.aa<20;
> be the same as query B:
> select a.key keya, b.key keyb, c.key keyc from src a left outer join src b on a.key=b.key
left outer join src c on b.key=c.key and b.key<10 where a.key<20;
> ?
> Currently, the result is different, query B gets wrong result!
> In SemanticAnalyzer.java, mergeJoins():
> ArrayList<ArrayList<ASTNode>> filters = target.getFilters();
> for (int i = 0; i < nodeRightAliases.length; i++) {
>   filters.add(node.getFilters().get(i + 1));
> }
> filters in node.getFilters().get(0) are lost.

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