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Re: How to retain lesser paths at add_path()? - Mailing list pgsql-hackers

From Robert Haas
Subject Re: How to retain lesser paths at add_path()?
Date
Msg-id CA+TgmobrZCBaGbD1k1UHkzCuyixQ43NFkkKTLCLCSO7Me8FuYw@mail.gmail.com
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In response to Re: How to retain lesser paths at add_path()?  (Kohei KaiGai <kaigai@heterodb.com>)
Responses Re: How to retain lesser paths at add_path()?
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On Mon, Aug 12, 2019 at 12:28 AM Kohei KaiGai <kaigai@heterodb.com> wrote:
> For implementation of the concept, this patch puts a hook on add_path
> / add_partial_path
> to override the path removal decision by extensions, according to its
> own viewpoint.

I don't think this hook is a very useful approach to this problem, and
I'm concerned that it might have a measurable performance cost.

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

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