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https://issues.apache.org/jira/browse/HIVE-21201?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16758333#comment-16758333
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Alan Jackoway commented on HIVE-21201:
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Looks similar to IMPALA-283.
> 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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