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https://issues.apache.org/jira/browse/CALCITE-3123?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Julian Hyde resolved CALCITE-3123.
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Resolution: Fixed
Fix Version/s: 1.20.0
Fixed in [e01ba5ab6|https://github.com/apache/calcite/commit/e01ba5ab6].
> In RelBuilder, eliminate duplicate aggregate calls
> --------------------------------------------------
>
> Key: CALCITE-3123
> URL: https://issues.apache.org/jira/browse/CALCITE-3123
> Project: Calcite
> Issue Type: Bug
> Reporter: Julian Hyde
> Priority: Major
> Fix For: 1.20.0
>
>
> In {{RelBuilder}}, eliminate duplicate aggregate calls. For example, if you
> call {{RelBuilder.aggregate}} with {{sum($1)}}, {{sum($2)}}, {{count($1)}},
> {{sum($1)}} then it would create an {{Aggregate}} with 3 aggregate calls
> (because {{sum($1)}} occurs twice), then add a {{Project [$1, $2, $3, $1]}}.
> The {{Project}} is necessary so that you get the number of output fields that
> you are expecting.
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