James Kim created CALCITE-4635:
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Summary: Distinct on aggregate window functions produce wrong
result
Key: CALCITE-4635
URL: https://issues.apache.org/jira/browse/CALCITE-4635
Project: Calcite
Issue Type: Bug
Reporter: James Kim
Using distinct with an aggregate window function like:
select (count(distinct \"T\".\"X\") over (partition by \"T\".\"Y\")) from
(VALUES (4, 6), (4, 1), (2, 1), (2, 1)) as T(x, y)
produces wrong result; the distinct function is not being applied i.e., the
result of the above query should be (1, 2) but currently it returns (1, 3).
After creating and running a test on RelOptRulesTest, I saw the distinct flag
is not being dropped, so I suspect this might be an issue on execution side.
I looked into resolving this issue but have been stuck as to where the fix
should be. For now I could throw with a RESOURCE.functionQuantifierNotAllowed
error in SqlOverOperator until this is fixed.
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