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From "Charles Chen (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-2325) Left semi join does not allow filter on right table
Date Fri, 29 Jul 2011 18:06:13 GMT
Left semi join does not allow filter on right table
---------------------------------------------------

                 Key: HIVE-2325
                 URL: https://issues.apache.org/jira/browse/HIVE-2325
             Project: Hive
          Issue Type: Bug
          Components: Query Processor
    Affects Versions: 0.7.1
            Reporter: Charles Chen


Given

{noformat}
create table invites (foo int, bar string) partitioned by (ds string);
create table invites2 (foo int, bar string) partitioned by (ds string);
explain select * from invites left semi join invites2 on invites.ds=invites2.ds where invites2.ds='2011-01-01';
{noformat}

an error:

{noformat}
FAILED: Error in semantic analysis: Line 1:86 Invalid table alias or column reference 'invites2':
(possible column names are: _col0, _col1, _col2)
{noformat}

is returned.

Presumably the groupby operation in the semi join doesn't preserve the column names?

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