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https://issues.apache.org/jira/browse/CALCITE-5283?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17652002#comment-17652002
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Benchao Li commented on CALCITE-5283:
-------------------------------------
[~FrankZou] Thanks for your contribution, I will review this in the next
following weeks if there is no other reviewers at that time.
> Add ARG_MIN, ARG_MAX (aka MIN_BY, MAX_BY) aggregate functions
> -------------------------------------------------------------
>
> Key: CALCITE-5283
> URL: https://issues.apache.org/jira/browse/CALCITE-5283
> Project: Calcite
> Issue Type: Bug
> Reporter: Julian Hyde
> Assignee: Zou
> Priority: Major
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Add ARG_MIN, ARG_MAX (aka MIN_BY, MAX_BY) aggregate functions.
> For example, the following query prints the name of the lowest paid employee
> in each department:
> {code:java}
> SELECT deptno, ARG_MIN(sal, ename)
> FROM emp
> GROUP BY deptno;
> +------------+------------+
> | deptno | _c1 |
> +------------+------------+
> | 10 | MILLER |
> | 20 | SMITH |
> | 30 | JAMES |
> +------------+------------+
> {code}
> If multiple employees have the same salary, arbitrarily chooses one to return.
> See [Yandex description of
> ARG_MIN|https://cloud.yandex.com/en/docs/datalens/function-ref/ARG_MIN]. Also
> implemented in Alibaba MaxCompute, Clickhouse, DuckDB. (And in Alibaba
> MaxCompute, Spark SQL, Firebolt, PrestoDB, Trino as MIN_BY/MAX_BY.)
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