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https://issues.apache.org/jira/browse/SPARK-7562?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Reynold Xin updated SPARK-7562:
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Description:
There is currently no error reporting for expression data types in analysis (we
rely on "resolved" for that, which doesn't provide great error messages for
types). It would be great to have that in checkAnalysis.
Ideally, it should be the responsibility of each Expression itself to specify
the types it requires, and report errors that way. We would need to define a
simple interface for that so each Expression can implement. The default
implementation can just use the information provided by
ExpectsInputTypes.expectedChildTypes.
was:
There is currently no error reporting for expression data types in analysis. It
would be great to have that in checkAnalysis.
Ideally, it should be the responsibility of each Expression itself to specify
the types it requires, and report errors that way. We would need to define a
simple interface for that so each Expression can implement. The default
implementation can just use the information provided by
ExpectsInputTypes.expectedChildTypes.
> Improve error reporting for expression data type mismatch
> ---------------------------------------------------------
>
> Key: SPARK-7562
> URL: https://issues.apache.org/jira/browse/SPARK-7562
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Reynold Xin
>
> There is currently no error reporting for expression data types in analysis
> (we rely on "resolved" for that, which doesn't provide great error messages
> for types). It would be great to have that in checkAnalysis.
> Ideally, it should be the responsibility of each Expression itself to specify
> the types it requires, and report errors that way. We would need to define a
> simple interface for that so each Expression can implement. The default
> implementation can just use the information provided by
> ExpectsInputTypes.expectedChildTypes.
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