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From "Peter Vary (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-21201) Aggregate Commands on HBase Table Omit Null Values
Date Mon, 04 Feb 2019 13:38:02 GMT

    [ https://issues.apache.org/jira/browse/HIVE-21201?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16759850#comment-16759850
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Peter Vary commented on HIVE-21201:
-----------------------------------

Looks like the same issue raised by [~dkuzmenko]: http://mail-archives.apache.org/mod_mbox/hive-dev/201809.mbox/%3CCAEa=iDXx6hT6o+LepqE1LgVmxbwMAGoNsTVJvA+gU2ZqCfMrVQ@mail.gmail.com%3E

> Aggregate Commands on HBase Table Omit Null Values
> --------------------------------------------------
>
>                 Key: HIVE-21201
>                 URL: https://issues.apache.org/jira/browse/HIVE-21201
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 1.1.0
>            Reporter: Alan Jackoway
>            Priority: Major
>
> We have an HBase-backed impala table, which has a string column (for the purpose of this
jira, {{sCol}})
> There are records where that column is null, which we can observe with queries like {{select
* from table where sCol is null limit 1}}
> However, when we run these commands, we get bad results:
> {code:sql}
> -- Returns 0
> select count(*) from table where sCol is null;
> -- Returns only rows for string values (we only have a few options in this case), no
row for null
> select sCol, count(*) from table group by sCol
> {code}
> These commands work as expected on parquet-backed tables. They also do not work in Impala,
where I will filed jira IMPALA-8152.



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