[jira] [Assigned] (FLINK-15546) Obscure error message from ScalarOperatorGens::generateCast

["Jark Wu (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-15546?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jark Wu reassigned FLINK-15546:
-------------------------------

    Assignee: Zhenghua Gao

> Obscure error message from ScalarOperatorGens::generateCast
> -----------------------------------------------------------
>
>                 Key: FLINK-15546
>                 URL: https://issues.apache.org/jira/browse/FLINK-15546
>             Project: Flink
>          Issue Type: Improvement
>          Components: Table SQL / API
>            Reporter: Rui Li
>            Assignee: Zhenghua Gao
>            Priority: Minor
>
> Consider the following case:
> {noformat}
> Flink SQL> describe foo;
> root
>  |-- x: ROW<`f1` DOUBLE, `f2` VARCHAR(10)>
> Flink SQL> insert into foo select row(1.1,'abc');
> [INFO] Submitting SQL update statement to the cluster...
> [ERROR] Could not execute SQL statement. Reason:
> org.apache.flink.table.planner.codegen.CodeGenException: Unsupported cast from 'ROW' to 'ROW'.
> {noformat}
> Users are unlikely to figure out what goes wrong from the above error message. Something like {{Unsupported cast from 'ROW<DECIMAL(2,1), CHAR(3)>' to 'ROW<DOUBLE, VARCHAR(10)>'}} will be more helpful.



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