Reynold Xin created SPARK-7562:
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Summary: 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. 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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