Re: Type of pg_buffercache_pages()::forknum

On Wed, Nov 12, 2025 at 10:46:12AM +0530, Ashutosh Bapat wrote:
> But C implementation uses ObjectIdGetDatum() where ObjectId is 32 bit integer.
> values[4] = ObjectIdGetDatum(fctx->record[i].forknum);
> 
> Since forknum values are within 16 bits and that's unlikely to change
> in future, int2 seems to ok. Also casting it to a wider integer, OID,
> also doesn't seem like a correctness issue. But it does look
> inconsistent and a reader of C implementation may think that the SQL
> datatype used is int4. Should we instead change the C Implementation
> to be
> 
> values[4] = Int16GetDatum((int16) fctx->record[i].forknum);
> 
> The code has been there for 17 years, and I didn't find any previous
> complaints. I propose to change just the master branch.

This just looks like a copy-pasto to me.  Nice catch, will fix on
HEAD.
--
Michael