Re: verbose cost estimate - Mailing list pgsql-hackers

From Tom Lane
Subject Re: verbose cost estimate
Date
Msg-id 20338.1575931240@sss.pgh.pa.us
Whole thread Raw
In response to Re: verbose cost estimate  (Tomas Vondra <tomas.vondra@2ndquadrant.com>)
Responses Re: verbose cost estimate  (Tomas Vondra <tomas.vondra@2ndquadrant.com>)
List pgsql-hackers
Tomas Vondra <tomas.vondra@2ndquadrant.com> writes:
> ... Perhaps a path-specific struct, referenced
> from the path and built only with verbose explain would be fine?

How would that work, given that the planner doesn't know whether its
output is going to get explained?  With features like the plan cache
and auto_explain in mind, it's very hard to see how you avoid having
to save the information always.

            regards, tom lane



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