Re: Column lookup in a row performance

Tom,

Thank you.
> (1) Backwards compatibility, and (2) it's not clear that a different
> layout would be a win for all cases.

I am curious regarding (2), for my understanding it is good to find
out at least one case when layout with lengths/offsets in a header
will be crucially worse. I will be happy if someone can elaborate.

сб, 30 мар. 2019 г. в 17:26, Tom Lane <tgl@sss.pgh.pa.us>:
>
> =?UTF-8?B?0J/QsNCy0LvRg9GF0LjQvSDQmNCy0LDQvQ==?= <vololo100@gmail.com> writes:
> > Does anyone know why the format is still the same?
>
> (1) Backwards compatibility, and (2) it's not clear that a different
> layout would be a win for all cases.
>
>                         regards, tom lane



--
Best regards,
Ivan Pavlukhin