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From "Edward Capriolo (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-3108) SELECT count(DISTINCT col) ... returns 0 if "col" is a partition column
Date Thu, 28 Jun 2012 03:51:44 GMT

    [ https://issues.apache.org/jira/browse/HIVE-3108?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13402814#comment-13402814
] 

Edward Capriolo commented on HIVE-3108:
---------------------------------------

Confirmed fixed in trunk.
{noformat}
[edward@tablitha dist]$ bin/hive
Logging initialized using configuration in jar:file:/home/edward/hive/trunk/build/dist/lib/hive-common-0.10.0-SNAPSHOT.jar!/hive-log4j.properties
Hive history file=/tmp/edward/hive_job_log_edward_201206272349_386020253.txt
hive> create table stocks (x int, y string) partitioned by (exchange string, symbol string);
OK
Time taken: 17.382 seconds
hive> alter table stocks add partition (exchange='nasdaq', symbol='ed');
OK
Time taken: 2.022 seconds
hive> alter table stocks add partition (exchange='nasdaq', symbol='guy');
OK
Time taken: 0.219 seconds
hive> alter table stocks add partition (exchange='jp', symbol='bla');    
OK
Time taken: 0.245 seconds
hive> select count(distinct exchange), count(distinct symbol) from stocks;
2	3
Time taken: 5.742 seconds
{noformat}
                
> SELECT count(DISTINCT col) ... returns 0 if "col" is a partition column
> -----------------------------------------------------------------------
>
>                 Key: HIVE-3108
>                 URL: https://issues.apache.org/jira/browse/HIVE-3108
>             Project: Hive
>          Issue Type: Bug
>          Components: Query Processor
>    Affects Versions: 0.8.0, 0.9.0
>         Environment: Mac OSX running Apache distribution of hadoop and hive natively.
>            Reporter: Dean Wampler
>              Labels: Hive
>
> Suppose "stocks" is a managed OR external table, partitioned by "exchange" and "symbol".
"count(DISTINCT x)" returns 0 for either "exchange", "symbol", or both:
> hive> SELECT count(DISTINCT exchange), count(DISTINCT symbol) from stocks;
> 0  0

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