Alan Jackoway created IMPALA-8152:
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Summary: Aggregate Commands on HBase Table Omit Null Values
Key: IMPALA-8152
URL: https://issues.apache.org/jira/browse/IMPALA-8152
Project: IMPALA
Issue Type: Bug
Affects Versions: Impala 2.12.0
Reporter: Alan Jackoway
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 Hive, where I will file a jira shortly.
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