Fujii Masao <masao.fujii@gmail.com> writes:
> On Sat, Feb 8, 2020 at 4:25 AM Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> AFAICS, this patch has caused an ABI break in v12. Do we really
>> believe that no extension references the values of the ScanOptions
>> enum?
> Yes, you are right. Some extensions may depend on it.
> It's better not to add new ScanOption not to break ABI.
I think it's okay to add a new value of ScanOption; what you can't
do is change the codes assigned to the existing values. So I'd
just revert those code changes and give SO_TYPE_TIDSCAN a value
that's out-of-order.
regards, tom lane