@twalthr yes @fhueske is correct the 2 functions are special expressions which requires special expression parsing. So far I am looking over the diff in https://github.com/apache/flink/pull/1926/files and didn't find anything abnormal but I will add additional tests for the lists of functions originally in the `ExpressionParser` class. Should I open a JIRA for it (haven't find a bug yet)
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