On 2020/11/27 1:45, Matthias van de Meent wrote:
> On Thu, 26 Nov 2020 at 00:55, Fujii Masao <masao.fujii@oss.nttdata.com> wrote:
>>
>> + * A heap scan need not return tuples for the last page it has
>> + * scanned. To ensure that heap_blks_scanned is equivalent to
>> + * total_heap_blks after the table scan phase, this parameter
>> + * is manually updated to the correct value when the table scan
>> + * finishes.
>>
>> So it's better to update this comment a bit? For example,
>>
>> If the scanned last pages are empty, it's possible to go to the next phase
>> while heap_blks_scanned != heap_blks_total. To ensure that they are
>> equivalet after the table scan phase, this parameter is manually updated
>> to the correct value when the table scan finishes.
>>
>
> PFA a patch with updated message and comment. I've reworded the
> messages to specifically mention empty pages and the need for setting
> heap_blks_scanned = total_heap_blks explicitly.
Thanks for updating the patch! It looks good to me.
Barring any objection, I will commit this patch (also back-patch to v12).
Regards,
--
Fujii Masao
Advanced Computing Technology Center
Research and Development Headquarters
NTT DATA CORPORATION
