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Fabian Hueske commented on FLINK-3754:
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Thanks [~yijieshen] for working on this issue. It would be really good to have
the validation a bit more centralized. Unfortunately, Calcite's RelBuilder does
not perform validation such as type checks. Some of these could Flink do
earlier than now.
A good starting point should be the test cases that check for incorrect usage
of the Table API.
> Add a validation phase before construct RelNode using TableAPI
> --------------------------------------------------------------
>
> Key: FLINK-3754
> URL: https://issues.apache.org/jira/browse/FLINK-3754
> Project: Flink
> Issue Type: Improvement
> Components: Table API
> Affects Versions: 1.0.0
> Reporter: Yijie Shen
> Assignee: Yijie Shen
>
> Unlike sql string's execution, which have a separate validation phase before
> RelNode construction, Table API lacks the counterparts and the validation is
> scattered in many places.
> I suggest to add a single validation phase and detect problems as early as
> possible.
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