Re: mention unused_oids script in pg_proc.dat

On 09.07.25 01:28, Michael Paquier wrote:
> On Tue, Jul 08, 2025 at 05:40:39PM +0300, Florents Tselai wrote:
>> On Tue, Jul 1, 2025 at 12:25 PM Peter Eisentraut <peter@eisentraut.org> wrote:
>>>> +
>>>> +Below are some checklists for common scenarios.
>>>> +
>>>> +## Adding a New Built-in SQL Command
>>>> +
>>>> +1. Implement the function in C and place it in the appropriate
>>> directory under `src` (typically in `src/utils/adt`)
>>>> +2. Each function should have a unique integer OID. Run the script
>>> `src/include/catalog/unused_oids` to find available ranges.
>>>> +3. Add the entry to `pg_proc.dat` following the surrounding
>>> conventions.
>>>
>>> Presumably, if you're developing this kind of thing, you are already
>>> reading some other part of the documentation, maybe xfunc.sgml?  Do we
>>> need to add more information there, or some links?
>>
>> I agree. Added a link reference to that xfunc-c
> 
> I understand Peter's comment that we need something more general than
> what your v2-0001 is proposing, the point being that modifying
> pg_proc.dat may apply to some concepts, but it's far from being all of
> them.  If you need to add a new in-core type, or something else to a
> different catalog, then you need to be aware of a completely different
> .dat file.  This set of instructions read as being a bit misleading,
> IMO.

I have committed the part that adds a link to the bki documentation.

I think the other parts, like how to add a new built-in function, didn't 
have consensus.  Maybe a wiki page or a blog post could be good forums 
for that.