Github user twalthr commented on the pull request: https://github.com/apache/flink/pull/359#issuecomment-73028436 The discussion is how a Function without any generics (raw) should be treated. In general we have 3 possiblities: - Skip input validation completely if Function implements ResultTypeQueryable - Introduce a Interface /Anntotation SkipInputValidation for special use cases - This PR: Skip input validation if Function is a raw type.
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