Re: Improper use about DatumGetInt32

On 2020-Nov-26, Peter Eisentraut wrote:

> The point of the patch is to have the range check somewhere.  If you just
> cast it, then you won't notice out of range arguments.  Note that other
> contrib modules that take block numbers work the same way.

I'm not saying not to do that; just saying we should not propagate it to
places that don't need it.  get_raw_page gets its page number from
PG_GETARG_INT64(), and the range check should be there.  But then it
calls get_raw_page_internal, and it could pass a BlockNumber -- there's
no need to pass an int64.  So get_raw_page_internal does not need a
range check.