Hi Henry, I recently submitted some PRs about Scalar functions, some of which have been merged and some are being reviewed, and some may be what you need.
Log2(x) :https://issues.apache.org/jira/browse/FLINK-9928 will be released in Flink 1.7 exp(x): exists here https://ci.apache.org/projects/flink/flink-docs-stable/dev/table/sql.html regular express support: use similar to , also see here https://ci.apache.org/projects/flink/flink-docs-stable/dev/table/sql.html regex extract : https://issues.apache.org/jira/browse/FLINK-9990 reviewing regex replace : https://issues.apache.org/jira/browse/FLINK-9991 reviewing The status of most scalar functions can be seen here : https://issues.apache.org/jira/browse/FLINK-6810 Thanks, vino. 徐涛 <[email protected]> 于2018年8月23日周四 下午3:16写道： > 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
