Hi Henry, Flink is an open source project. New build-in functions are constantly contributed to Flink. Right now, there are more than 5 PRs open to add or improve various functions.
If you find that some functions are not working correctly or could be improved, you can open a Jira issue. The same applies to missing functions. Before opening an issue, it would be good to check if there's another issue for the same problem. After opening a Jira issue, you can either wait for somebody to pick it up or contribute the function yourself. The scalar function umbrella Jira issue [1] explains what needs to be done to add a function. Contributing scalar functions is a good way to get involved with the Flink development. Best, Fabian [1] https://issues.apache.org/jira/browse/FLINK-6810 Am Do., 23. Aug. 2018 um 09:16 Uhr schrieb 徐涛 <happydexu...@gmail.com>: > Hi All, > I found flink is lack of some basic functions , for example string > split, regular express support, json parse and extract support, these > function are used frequently in development , but they are not supported, > use has to write UDF to support this. > And some of the provided functions are lack of usability, for > example log(2, 1.0) and exp(1.0) with double params are not supported. I > think they are not hard to implement and they are very basic functions. > Will flink enhance the basic functions , maybe in later releases? > > Best, > Henry
