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From: Alvaro Herrera <[email protected]>
To: Amit Langote <[email protected]>
Cc: Robert Haas <[email protected]>
Cc: Jacob Champion <[email protected]>
Cc: David Rowley <[email protected]>
Cc: Tom Lane <[email protected]>
Cc: PostgreSQL-development <[email protected]>
Subject: Re: generic plans and "initial" pruning
Date: Fri, 9 Dec 2022 12:37:44 +0100
Message-ID: <[email protected]> (raw)
In-Reply-To: <CA+HiwqGQkAXxFko8qscb9yKxp01V56m-kiO74ccT-n3W_DvCeQ@mail.gmail.com>

On 2022-Dec-09, Amit Langote wrote:

> Pruning will be done afresh on every fetch of a given cached plan when
> CheckCachedPlan() is called on it, so the part_prune_results_list part
> will be discarded and rebuilt as many times as the plan is executed.
> You'll find a description around CachedPlanSavePartitionPruneResults()
> that's in v12.

I see.

In that case, a separate container struct seems warranted.

-- 
Álvaro Herrera               48°01'N 7°57'E  —  https://www.EnterpriseDB.com/
"Industry suffers from the managerial dogma that for the sake of stability
and continuity, the company should be independent of the competence of
individual employees."                                      (E. Dijkstra)

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