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From "Bennie Schut (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HIVE-1138) Hive using lzo comporession returns unexpected results.
Date Tue, 09 Feb 2010 09:05:28 GMT

     [ https://issues.apache.org/jira/browse/HIVE-1138?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Bennie Schut updated HIVE-1138:
-------------------------------

    Attachment: test.csv

How to reproduce the problem:

{noformat} 
CREATE TABLE test_load (
  id     int
, code   string
) ROW FORMAT DELIMITED FIELDS TERMINATED BY '\t' LINES TERMINATED BY '\n';

LOAD DATA INPATH '/user/dwh/test.csv' INTO TABLE test_load;

-- this one correctly returns 5 rows.
select distinct id from test_load;

SET hive.exec.compress.output=true;
SET mapred.output.compression.codec=com.hadoop.compression.lzo.LzoCodec;
SET mapred.map.output.compression.codec=com.hadoop.compression.lzo.LzoCodec;

-- this one returns incorrect results.
select distinct id from test_load;
{noformat} 

> Hive using lzo comporession returns unexpected results.
> -------------------------------------------------------
>
>                 Key: HIVE-1138
>                 URL: https://issues.apache.org/jira/browse/HIVE-1138
>             Project: Hadoop Hive
>          Issue Type: Bug
>          Components: Query Processor
>    Affects Versions: 0.6.0
>         Environment: hadoop 0.20.1, hive trunk 2010-02-03
>            Reporter: Bennie Schut
>            Priority: Blocker
>         Attachments: test.csv
>
>
> I have a tab separated files I have loaded it with "load data inpath" then I do a
> SET hive.exec.compress.output=true;
> SET mapred.output.compression.codec=com.hadoop.compression.lzo.LzoCodec;
> SET mapred.map.output.compression.codec=com.hadoop.compression.lzo.LzoCodec;
> select distinct login_cldr_id as cldr_id from chatsessions_load;
> Ended Job = job_201001151039_1641
> OK
> NULL
> NULL
> NULL
> Time taken: 49.06 seconds
> however if I start it without the set commands I get this:
> Ended Job = job_201001151039_1642
> OK
> 2283
> Time taken: 45.308 seconds
> Which is the correct result.
> When I do a "insert overwrite" on a rcfile table it will actually compress the data correctly.
> When I disable compression and query this new table the result is correct.
> When I enable compression it's wrong again.
> I see no errors in the logs.

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