Re: Inheritance efficiency

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От John R Pierce
Тема Re: Inheritance efficiency
Дата
Msg-id 4BDBA0F5.4040608@hogranch.com
обсуждение исходный текст
Ответ на Re: Inheritance efficiency  (Greg Smith <greg@2ndquadrant.com>)
Ответы Re: Inheritance efficiency  (Cédric Villemain <cedric.villemain.debian@gmail.com>)
Re: Inheritance efficiency  (Alban Hertroys <dalroi@solfertje.student.utwente.nl>)
Список pgsql-general
Greg Smith wrote:
> Enterprise grade doesn't mean anything.  Partitioning designs that
> require thousands of child tables to work right are fundamentally
> misdesigned anyway, so there is no reason for any of the contributors
> to the project to work on improving support for them.  There are far
> too many obvious improvements that could be made to PostgreSQL, ones
> that will benefit vastly more people, to divert resources toward
> something you shouldn't be dong anyway like that.
>

my sql developer, who's been doing oracle for 15+ years, says postgres'
partitioning is flawed from his perspective because if you have a
prepared statement like..

    SELECT fields FROM partitioned_table WHERE primarykey = $1;

it doesn't optimize this very well and ends up looking at all the
sub-table indicies.   ir you instead execute the statement

    SELECT fields FROM parritioned_table WHERE primarykey = constant;

he says the planner will go straight to the correct partition.

i haven't confirmed this for myself.



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