Just a quick idea for using C. I'd create a generic Java UDF and use JNA
[1] in it to call a function written in C.
UDF could be something like invokeC("libraryName", "functionName", args)
and would get JNA's Function [2] and invoke it accordingly.
[1] https://github.com/java-native-access/jna
[2]
https://github.com/java-native-access/jna/blob/578220eff46dc0b808cab62f87408ceb33c34d37/src/com/sun/jna/Function.java#L101
On Thu, Dec 17, 2020 at 1:45 PM Till Rohrmann <trohrm...@apache.org> wrote:
> Hi Josh,
>
> Currently Flink supports Java, Scala and Python for defining SQL UDFs.
> There are no concrete plans to extend the set of supported languages at the
> moment.
>
> In general, these kinds of contributions are always welcome. What we have
> to make sure is to see how it fits into the overall story. In order to
> assess this, I would recommend writing to d...@flink.apache.org to propose
> your idea and the solution proposal.
>
> Cheers,
> Till
>
> On Thu, Dec 17, 2020 at 11:53 AM Joshua Fan <joshuafat...@gmail.com>
> wrote:
>
>> Hi,
>>
>> Does the flink community have a plan to support flink sql udf in any
>> language? For example, a udf in c or php. Because in my company, many
>> developers do not know java or scala, they use c in their usual work.
>>
>> Now we have a workaround to support this situation by creating a process
>> running the c logic, and the process communicates with flink sql by a
>> wrapper udf function.
>>
>> So, here I have two questions:
>> 1. Does the flink community have a plan to support flink sql udf in any
>> language?
>> 2. If the answer to question 1 is no, is there any possibility to push
>> our solution to flink? Is this udf process staff in line with the ideas of
>> the community aboud flink sql?
>>
>> Thanks
>> Yours Sincerely
>> Josh
>>
>>
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