[jira] [Assigned] (CALCITE-4220) In SqlToRelConverter, use RelBuilder for creating Aggregate

["Julian Hyde (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CALCITE-4220?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Julian Hyde reassigned CALCITE-4220:
------------------------------------

    Assignee: Julian Hyde

> In SqlToRelConverter, use RelBuilder for creating Aggregate
> -----------------------------------------------------------
>
>                 Key: CALCITE-4220
>                 URL: https://issues.apache.org/jira/browse/CALCITE-4220
>             Project: Calcite
>          Issue Type: Bug
>            Reporter: Julian Hyde
>            Assignee: Julian Hyde
>            Priority: Major
>
> In {{SqlToRelConverter}} use {{RelBuilder}} for creating {{Aggregate}}. Currently we call LogicalAggregate.create directly, and that misses some optimizations.
> Add config option {{RelBuilder.Config.skipAggOnUniqueKey()}} to disable the optimization that we don't create an {{Aggregate}} if the input is already unique on the GROUP BY key. Without it, some tests in {{SqlToRelConverterTest}} become trivial.
> Also, that optimization is not valid if there are multiple group sets. (Because we should output multiple rows, and Project only returns one.) So disable it in that case.



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