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From liancheng <>
Subject [GitHub] spark pull request: [SQL] Checking data types when resolving types
Date Sun, 22 Mar 2015 08:38:28 GMT
Github user liancheng commented on the pull request:
    I like the idea of compile time type checking. This could be generalized to all UDFs.
For example, `Like` and  `RLike` should also check whether their arguments are of `StringType`.
Right now we do necessary (?) implicit type conversions for some commonly used functions in
`FunctionArgumentConversion`. It should make more sense to move these conversions into all
those individual function definitions and add type checking there.

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