hadoop-pig-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Thejas M Nair (JIRA)" <j...@apache.org>
Subject [jira] Created: (PIG-1022) optimizer pushes filter before the foreach that generates column used by filter
Date Wed, 14 Oct 2009 16:25:31 GMT
optimizer pushes filter before the foreach that generates column used by filter
-------------------------------------------------------------------------------

                 Key: PIG-1022
                 URL: https://issues.apache.org/jira/browse/PIG-1022
             Project: Pig
          Issue Type: Bug
          Components: impl
            Reporter: Thejas M Nair


grunt> l = load 'students.txt' using PigStorage() as (name:chararray, gender:chararray,
age:chararray, score:chararray);
grunt> f = foreach l generate name, gender, age,score, '200'  as gid:chararray;
grunt> g = group f by (name, gid);
grunt> f2 = foreach g generate group.name as name: chararray, group.gid as gid: chararray;
grunt> filt = filter f2 by gid == '200';
grunt> explain filt;

In the plan generated filt is pushed up after the load and before the first foreach, even
though the filter is on gid which is generated in first foreach.

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


Mime
View raw message