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From: Tom Lane <[email protected]>
To: Fabrice Chapuis <[email protected]>
Cc: [email protected]
Subject: Re: infinite loop in an update statement
Date: Mon, 09 Sep 2024 11:00:12 -0400
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAA5-nLDmkuRbjHJvf2-Sz0FxtJtoFdrg4mUTy6N84UpZtGZJwQ@mail.gmail.com>
References: <CAA5-nLDmkuRbjHJvf2-Sz0FxtJtoFdrg4mUTy6N84UpZtGZJwQ@mail.gmail.com>

Fabrice Chapuis <[email protected]> writes:
> why this update does not return instantly?

> UPDATE table_a a
>  SET col1 = (SELECT MIN(b.col1)
>                     FROM table_b b
>                     WHERE b.col2 = a.col2)

Maybe query is waiting for a lock on one of those tables?

			regards, tom lane

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