JingsongLi edited a comment on issue #9146: [FLINK-13284] [table-planner-blink] Correct some builtin functions' r… URL: https://github.com/apache/flink/pull/9146#issuecomment-512653019 > Thanks for this PR @lincoln-lil . for stream job, I think "return null" is the general case (maybe for some special cases, users also want "throw exception" when processing illegal data). while for batch job, "throw exception" is more general ?! for the long term, maybe we should add a config to let users choose the mode. for this PR, it looks good to me. For batch job, "return null" is more popular too in hadoop sql engines.
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