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https://issues.apache.org/jira/browse/CALCITE-6830?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17927137#comment-17927137
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Abbas Gadhia commented on CALCITE-6830:
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Co-incidently i was working on the avg fn in trino a few days ago. This is its
behavior
{noformat}
avg(tinyint, smallint, int, bigint) -> double
avg(real) -> real
avg(double) -> double
avg(decimal(10,4)) -> decimal(10,4){noformat}
> AVG aggregate function with integer argument type return wrong type
> -------------------------------------------------------------------
>
> Key: CALCITE-6830
> URL: https://issues.apache.org/jira/browse/CALCITE-6830
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.39.0
> Reporter: Lantao Jin
> Priority: Major
> Labels: pull-request-available
>
> To reproduce (agg.iq)
> {code:java}
> !use post
> !set outputformat mysql
> SELECT avg(deptno) as a FROM emp;
> {code}
> Should return 22.1429, but returns 22.
> This behavior is different from other databases.
> Since the AVG agg with integer argument returns wrong type, the behaviors of
> var_pop, var_samp, stddev_pop, stddev_samp and stddev are wrong either.
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