Re: Anti join confusion

Hi Laurenz
Actually ,Many fork postgresql databases have already implemented ,For
example, if the relevant field has a non-null constraint ，Many databases
can do the same thing as not exist （ MySQL ，SQL Server，Oracle）

Thanks

On Mon, Feb 24, 2025 at 7:55 PM Laurenz Albe <laurenz(dot)albe(at)cybertec(dot)at>
wrote:

> On Mon, 2025-02-24 at 17:12 +0800, wenhui qiu wrote:
> > Do we have plans for NOT IN subquery pull up?
>
> As mentioned before, that is not possible.
> Best practice is to avoid NOT IN with subqueries altogether.
> The result is usually not what people expect it to be.
>
> Yours,
> Laurenz Albe
>
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