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From: Álvaro Herrera <[email protected]>
To: Amul Sul <[email protected]>
Cc: [email protected] <[email protected]>
Subject: Re: Allow NOT VALID foreign key constraints on partitioned tables.
Date: Tue, 21 Jan 2025 22:06:14 +0100
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAAJ_b95pjru9JxU4Ve8yRFSCPO8VNmur8jfuHrACWuTBDt97zg@mail.gmail.com>


Suppose I have a hierarchy like this

      parent
        |
      child
       /\
      /  \
     /    grandchild2
    /
  grandchild1

and I have a validated constraint on grandchild1 and an invalid
constraint on child.  What happens if I add a constraint on parent?  In
my understanding, it should not attempt to revalidate the constraint on
grandchild1, because it's known valid; but I don't think I see code that
would skip validation there.  That is, QueueFKConstraintValidation does
its thing unconditionally (esp. recursing to children), which seems
wrong.

-- 
Álvaro Herrera         PostgreSQL Developer  —  https://www.EnterpriseDB.com/
"I am amazed at [the pgsql-sql] mailing list for the wonderful support, and
lack of hesitasion in answering a lost soul's question, I just wished the rest
of the mailing list could be like this."                               (Fotis)
              https://postgr.es/m/[email protected]

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