Re: B-Tree support function number 3 (strxfrm() optimization)

On Thu, Aug 7, 2014 at 4:19 PM, Peter Geoghegan <pg(at)heroku(dot)com> wrote:
> On Thu, Aug 7, 2014 at 12:17 PM, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
>> Gah. Hit send to soon. Also, as much as I'd prefer to avoid
>> relitigating the absolutely stupid debate about how to expand the
>> buffers, this is no good:
>>
>> + tss->buflen1 = Max(len1 + 1, tss->buflen1 * 2);
>>
>> If the first expansion is for a string >512MB and the second string is
>> longer than the first, this will exceed MaxAllocSize and error out.
>
> Fair point. I think this problem is already present in a few existing
> places, but it shouldn't be. I suggest this remediation:
>
>> + tss->buflen1 = Max(len1 + 1, Min(tss->buflen1 * 2, (int) MaxAllocSize));
>
> I too would very much prefer to not repeat that debate. :-)

Committed that way. As the patch is by and large the same as what I
submitted for this originally, I credited myself as first author and
you as second author. I hope that seems fair.

--
Robert Haas
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