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help / color / mirror / Atom feedFrom: Ashutosh Bapat <[email protected]>
To: Etsuro Fujita <[email protected]>
Cc: Rajkumar Raghuwanshi <[email protected]>
Cc: pgsql-hackers <[email protected]>
Subject: Re: Expression errors with "FOR UPDATE" and postgres_fdw with partition wise join enabled.
Date: Mon, 9 Jul 2018 17:13:09 +0530
Message-ID: <CAFjFpRf-t_dM=qirB5+95wT1hSCLs8mQqbfRSKP=xUuhnOhbOQ@mail.gmail.com> (raw)
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>
> I don't have any numbers right now, so that is nothing but a concern. But as
> I said in a previous email, in the approach I proposed, we don't need to
> spend extra cycles where partitioning is not involved. I think that is a
> good thing in itself. No?
At the cost of having targetlist being type inconsistent. I don't have
any testcase either to show that that's a problem in practice. So,
it's a trade-off of a concern vs concern.
Apart from that, in your approach there are extra cycles spent in
traversing the targetlist to add ConvertRowtypeExpr, albeit only when
there is a whole-row expression in the targetlist, when creating
plans. That's not there in my patch.
--
Best Wishes,
Ashutosh Bapat
EnterpriseDB Corporation
The Postgres Database Company
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To: [email protected]
Cc: [email protected], [email protected], [email protected]
Subject: Re: Expression errors with "FOR UPDATE" and postgres_fdw with partition wise join enabled.
In-Reply-To: <CAFjFpRf-t_dM=qirB5+95wT1hSCLs8mQqbfRSKP=xUuhnOhbOQ@mail.gmail.com>
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