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https://issues.apache.org/jira/browse/FLINK-15475?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rong Rong updated FLINK-15475:
------------------------------
Description:
Currently there's no way to "peek" into a `Transformation` object and see if
`typeUsed` has been set or not. The only way is to invoke the `setOutputType`
API and wrap around it with a try-catch block similar to:
{code:java}
try {
(SingleOutputStreamOperator)dataStream
.returns(myOutputType);
} catch (ValidationException ex) {
// ... handle exception when type has been used.
}
{code}
It would be nice if we have a `isTypeUsed()` or `isOutputTypeUsed()` API to
check whether a particular transformation has a definitive output type set /
used or not.
was:
Currently there's no way to "peek" into a `Transformation` object and see if
`typeUsed` has been set or not. The only way is to invoke the `setOutputType`
API and wrap around it with a try-catch block. See:
It would be nice if we have a `isTypeUsed()` or `isOutputTypeUsed()` API to
check whether a particular transformation has a definitive output type set /
used or not.
> Add isOutputTypeUsed() API to Transformation
> --------------------------------------------
>
> Key: FLINK-15475
> URL: https://issues.apache.org/jira/browse/FLINK-15475
> Project: Flink
> Issue Type: Improvement
> Components: API / Core, API / DataSet, API / DataStream
> Reporter: Rong Rong
> Assignee: Rong Rong
> Priority: Minor
>
> Currently there's no way to "peek" into a `Transformation` object and see if
> `typeUsed` has been set or not. The only way is to invoke the `setOutputType`
> API and wrap around it with a try-catch block similar to:
> {code:java}
> try {
> (SingleOutputStreamOperator)dataStream
> .returns(myOutputType);
> } catch (ValidationException ex) {
> // ... handle exception when type has been used.
> }
> {code}
> It would be nice if we have a `isTypeUsed()` or `isOutputTypeUsed()` API to
> check whether a particular transformation has a definitive output type set /
> used or not.
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