Re: [BUG] false positive in bt_index_check in case of short 4B varlena datum - Mailing list pgsql-bugs

> On 12 May 2026, at 13:22, Alexander Korotkov <aekorotkov@gmail.com> wrote:
>
> On Tue, May 12, 2026 at 12:17 PM Andrey Borodin <x4mmm@yandex-team.ru> wrote:
>>> On 9 May 2026, at 04:07, Michael Paquier <michael@paquier.xyz> wrote:
>>>
>>> On Mon, May 04, 2026 at 10:20:04AM +0500, Andrey Borodin wrote:
>>>> However, I'd like to note that (VARSIZE_1B() < TOAST_INDEX_TARGET) is
>>>> constantly true for 8Kb+ pages.
>>>
>>> How much slower?  I cannot imagine that it matters much in this code
>>> path, but you are getting me worried.
>>
>>
>> I think there will be no performance difference.
>>
>> Change proposed by Alexander only prevents use of VARSIZE() against datum
>> that is VARSIZE_1B. AFAICS no actual behavior would change.
>>
>> On some occasions we would have to normilize less tuples.
>
> Any objections if I push and backpatch this?

Kind reminder, let's resolve this thread. Thank you!


Best regards, Andrey Borodin.