[jira] [Assigned] (FLINK-3728) Throw meaningful exceptions for unsupported SQL features

["Fabian Hueske (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-3728?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Fabian Hueske reassigned FLINK-3728:
------------------------------------

    Assignee: Fabian Hueske

> Throw meaningful exceptions for unsupported SQL features
> --------------------------------------------------------
>
>                 Key: FLINK-3728
>                 URL: https://issues.apache.org/jira/browse/FLINK-3728
>             Project: Flink
>          Issue Type: Bug
>          Components: Table API
>    Affects Versions: 1.1.0
>            Reporter: Vasia Kalavri
>            Assignee: Fabian Hueske
>
> We must explicitly exclude unsupported SQL features such as Grouping Sets from being translated to Flink programs. 
> Otherwise, the resulting program will compute invalid results.
> For that we must restrict the Calcite rules that translate Logical {{RelNodes}} into {{DataSetRel}} or {{DataStreamRel}} nodes.
> We may only translate to {{DataSetRel}} or {{DataStreamRel}} nodes if these support the semantics of the {{RelNode}}.
> Not translating a {{RelNode}} will yield a Calcite {{CannotPlanException}} that we should catch and enrich with a meaningful error message.



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