Re: Column lookup in a row performance - Mailing list pgsql-hackers

From Павлухин Иван
Subject Re: Column lookup in a row performance
Date
Msg-id CAOykqKep-YVTZw8ktkrNnfmnwozC6DwRCfqUPVKQMQdKge=ryA@mail.gmail.com
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In response to Re: Column lookup in a row performance  (Tom Lane <tgl@sss.pgh.pa.us>)
Responses Re: Column lookup in a row performance
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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



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