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https://issues.apache.org/jira/browse/FLINK-15546?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rui Li updated FLINK-15546:
---------------------------
Description:
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.
> Obscure error message in ScalarOperatorGens::generateCast
> ---------------------------------------------------------
>
> Key: FLINK-15546
> URL: https://issues.apache.org/jira/browse/FLINK-15546
> Project: Flink
> Issue Type: Improvement
> Reporter: Rui Li
> Priority: Major
>
> 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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