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https://issues.apache.org/jira/browse/IMPALA-8001?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Paul Rogers reassigned IMPALA-8001:
-----------------------------------
Assignee: (was: Paul Rogers)
> PlannerTest, constant folding verifies wrong results
> ----------------------------------------------------
>
> Key: IMPALA-8001
> URL: https://issues.apache.org/jira/browse/IMPALA-8001
> Project: IMPALA
> Issue Type: Bug
> Components: Frontend
> Affects Versions: Impala 3.1.0
> Reporter: Paul Rogers
> Priority: Minor
>
> {{PlannerTest.testConstantFolding}} is designed to test constant folding
> (replacing complex constant expressions with the simplified form.) However,
> one of the tests does not actually work and the wrong result has been
> accepted as the “golden” result. Test case:
> {noformat}
> # Test analytic eval node.
> select first_value(1 + 1 + int_col - (1 - 1)) over
> (partition by concat(concat('a', 'b'), string_col)
> order by greatest(greatest(10, 20), bigint_col))
> from functional.alltypes
> ---- PLAN
> Analyzed query: SELECT first_value(1 + 1 + int_col - (1 - 1)) OVER (PARTITION
> BY
> concat(concat('a', 'b'), string_col) ORDER BY greatest(greatest(10, 20),
> bigint_col) ASC) FROM functional.alltypes
> {noformat}
> Expected result:
> {noformat}
> Analyzed query: SELECT first_value(2 + int_col - 0) OVER (PARTITION BY
> concat('ab', string_col) ORDER BY greatest(20, bigint_col) ASC) FROM
> functional.alltypes
> {noformat}
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