Gopal Vijayaraghavan created HIVE-22448:
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Summary: CBO: Expand the multiple count distinct with a group-by
key
Key: HIVE-22448
URL: https://issues.apache.org/jira/browse/HIVE-22448
Project: Hive
Issue Type: Bug
Reporter: Gopal Vijayaraghavan
{code}
create temporary table mytable1 (x integer, y integer, z integer, a integer);
explain cbo
select z, x, count(distinct y), count(distinct a)
from mytable1
group by z, x;
explain cbo
select z, x, count(distinct y), count(distinct a)
from mytable1
{code}
The first is not vectorized, the second one is because of the ROLLUP based
rewrite for count distinct.
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