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https://issues.apache.org/jira/browse/CALCITE-4818?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chunwei Lei resolved CALCITE-4818.
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Resolution: Fixed
Fixed in
[https://github.com/apache/calcite/commit/3af1d78f7e60588c2497f8e0095d715ab179149a.]
Thank you for the PR, [~tledkov-gridgain]!
> AggregateExpandDistinctAggregatesRule must infer correct data type for top
> aggregate calls
> ------------------------------------------------------------------------------------------
>
> Key: CALCITE-4818
> URL: https://issues.apache.org/jira/browse/CALCITE-4818
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.27.0
> Reporter: Taras Ledkov
> Assignee: Taras Ledkov
> Priority: Major
> Labels: pull-request-available
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> When SUM data type derivation is more complex, e.g.:
> {code}
> SUM(TINYINT | SMALLINT | INTEGER) -> BIGINT
> SUM(BIGINT) -> DECIMAL
> {code}
> The rule {{AggregateExpandDistinctAggregatesRule}} creates the top aggregate
> calls with invalid type for not distinct calls.
> e.g. {{SELECT SUM(comm), SUM(DISTINCT comm) FROM emp}}
> Please take a look at the reproducer in the PR.
> *Proposed fix:* infer type of top aggregates by input row type. Pass
> {{null}} type to the call method {{AggregateCall#create}}.
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