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Posted to dev@hive.apache.org by "Danran Lai (JIRA)" <ji...@apache.org> on 2014/07/14 11:44:04 UTC
[jira] [Created] (HIVE-7400) count and count distinct not correct
Danran Lai created HIVE-7400:
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Summary: count and count distinct not correct
Key: HIVE-7400
URL: https://issues.apache.org/jira/browse/HIVE-7400
Project: Hive
Issue Type: Bug
Components: Query Processor
Affects Versions: 0.11.0
Reporter: Danran Lai
I have a table in Hive and I want to count unique records and all records.
Table looks like:
{quote}
sid string
param map<string,string>
domain string
product string
{quote}
And my query like this:
{quote}
select domain,product,count(1) as num,count(distinct param['from']) as user_num
from table
group by domain,product
{quote}
But the results are not correct. I can get the right user_num, but the num is wrong which is less than the real num. The real num is about 30 millon but I can only get 9 millon.
So how can I fix this so that I get the correct result?
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