Re: [Beginner Question]Is there way to test the postgres's kernel function?

["David G. Johnston" <david.g.johnston@xxxxxxxxx>]

On Mon, Jul 24, 2023 at 2:43 AM Wen Yi <wen-yi@xxxxxx> wrote:

Hi community,

I am learning the kernel of the postgres, and I want to test the make_relative_path function to know what it's operational principle.(I can read it's code, and I want to actually run it)

But I really don't know how to do it, wrtite a extension?

Can someone give me some advice?

A formal extension seems like overkill.  PostgreSQL provides an ability to write customer user-space functions in C.  You ought to be able to leverage that for this specific task.

https://www.postgresql.org/docs/current/xfunc-c.html

David J.