[jira] [Closed] (FLINK-6884) Incompatible TableSource#getReturnType and actual input type should fail faster

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

     [ https://issues.apache.org/jira/browse/FLINK-6884?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jark Wu closed FLINK-6884.
--------------------------
    Resolution: Fixed

Fixed in 59bd8bec1a47fbf120d0df91d1de988c090ab0f6

> Incompatible TableSource#getReturnType and actual input type should fail faster
> -------------------------------------------------------------------------------
>
>                 Key: FLINK-6884
>                 URL: https://issues.apache.org/jira/browse/FLINK-6884
>             Project: Flink
>          Issue Type: Bug
>          Components: Table API & SQL
>    Affects Versions: 1.3.0
>            Reporter: Dawid Wysakowicz
>            Assignee: sunjincheng
>
> When a {{TableSource#getReturnType}} differs from the actual input type the exception is thrown in code generation step with an exception that is hard to track back:
> {code}
> org.apache.flink.table.codegen.CodeGenException: Arity of result type does not match number of expressions.
> 	at org.apache.flink.table.codegen.CodeGenerator.generateResultExpression(CodeGenerator.scala:940)
> 	at org.apache.flink.table.codegen.CodeGenerator.generateConverterResultExpression(CodeGenerator.scala:883)
> 	at org.apache.flink.table.plan.nodes.CommonScan$class.generatedConversionFunction(CommonScan.scala:57)
> 	at org.apache.flink.table.plan.nodes.datastream.StreamTableSourceScan.generatedConversionFunction(StreamTableSourceScan.scala:35)
> 	at org.apache.flink.table.plan.nodes.datastream.StreamScan$class.convertToInternalRow(StreamScan.scala:48)
> 	at org.apache.flink.table.plan.nodes.datastream.StreamTableSourceScan.convertToInternalRow(StreamTableSourceScan.scala:35)
> 	at org.apache.flink.table.plan.nodes.datastream.StreamTableSourceScan.translateToPlan(StreamTableSourceScan.scala:107)
> {code}
> It would be nice if more meaningful exception was thrown earlier.



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