implement rest endpoint

[jkhaliqi]

Description

Part of: https://github.com/prestodb/rfcs/pull/25/files
Conveniently right now we have java and c++ functions being called and most of the java functions work with cpp functions. Also the java function has to be identical to the cpp function for it to work. Now people have the choice to create their own functions and if someone creates a function that is not known to java we can either crash of have this method call so that it creates a function in cpp to be called and it does not crash. The point of those functions outside of java is to speed up planning of execution and nodes by these functions that are not there in java.

Motivation and Context

Open issue: https://github.ibm.com/lakehouse/tracker/issues/8413

Impact

Test Plan

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• ✅ login: abevk2023 / name: Abe Varghese (5434766)
• ✅ login: jkhaliqi (7507b50)

[tdcmeehan]

Please rebase your PR and add the OpenAPI documentation to the OpenAPI module

[tdcmeehan]

We'll need to create a test that proves this works. See an example here for expression evaluation that sets up a mock endpoint for evaluation: https://github.com/prestodb/presto/pull/23331/files#diff-48ca45cdbb379b0774a87a3b94925c737039a2975be40c8a282843c9b26717f2R118

Give it a try and let me know if you need help implementing it.

[aditi-pandit]

@jkhaliqi : Please can you give more information about this PR and the functionality. Is this part of any RFC ?

[tdcmeehan]

It's part of https://github.com/prestodb/rfcs/pull/25/files

@jkhaliqi let's update the PR description to give more context.

[tdcmeehan]

Do we need this dependency? If so, why?

[jkhaliqi]

I believe this dependency is needed for the MySqlFunctionNamespaceManagerFactory where it is creating a new DriftNettyClientModule(). I just changed the code position around because it was under the testing section so I put it above that section in the pom.xml file.

[tdcmeehan]

Where is this injected?

[jkhaliqi]

I believe it is injected in SqlFunctionExecutors

@Inject
public SqlFunctionExecutors(Map<Language, FunctionImplementationType> supportedLanguages, SqlFunctionExecutor sqlFunctionExecutor)
{
    this.supportedLanguages = requireNonNull(supportedLanguages, "supportedLanguages is null");
    this.sqlFunctionExecutor = requireNonNull(sqlFunctionExecutor, "sqlFunctionExecutor is null");
}