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Re: FETCH FIRST clause WITH TIES option - Mailing list pgsql-hackers

From Robert Haas
Subject Re: FETCH FIRST clause WITH TIES option
Date
Msg-id CA+TgmoaCO14q0cVkZpntRh+0wQArO6mF14uF6hZ_QcdnfHDR6Q@mail.gmail.com
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In response to Re: FETCH FIRST clause WITH TIES option  (Andrew Gierth <andrew@tao11.riddles.org.uk>)
Responses Re: FETCH FIRST clause WITH TIES option  (Tomas Vondra <tomas.vondra@2ndquadrant.com>)
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On Mon, Oct 29, 2018 at 12:48 PM Andrew Gierth
<andrew@tao11.riddles.org.uk> wrote:
> Then FETCH FIRST N WITH TIES becomes "stop when the expression
>   rank() over (order by ...) <= N
> is no longer true" (where the ... is the existing top level order by)

Wouldn't that be wicked expensive compared to something hard-coded
that does the same thing?

-- 
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

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