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Re: Reduce "Var IS [NOT] NULL" quals during constant folding - Mailing list pgsql-hackers

From Richard Guo
Subject Re: Reduce "Var IS [NOT] NULL" quals during constant folding
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Msg-id CAMbWs49tV54J7WD5EtaLabmROXeECx8-Os+yfaLk0Ywqpc_Tbw@mail.gmail.com
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In response to Reduce "Var IS [NOT] NULL" quals during constant folding  (Richard Guo <guofenglinux@gmail.com>)
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On Mon, Jun 30, 2025 at 4:26 PM Richard Guo <guofenglinux@gmail.com> wrote:
> On Wed, May 28, 2025 at 6:28 PM Richard Guo <guofenglinux@gmail.com> wrote:
> > This patchset does not apply anymore due to 2c0ed86d3.  Here is a new
> > rebase.

> This patchset does not apply anymore, due to 5069fef1c this time.
> Here is a new rebase.

Here is a new rebase.  I moved the call to preprocess_relation_rtes to
a later point within convert_EXISTS_sublink_to_join, so we can avoid
the work if it turns out that the EXISTS SubLink cannot be flattened.
Nothing essential has changed.

The NOT-IN pullup work depends on the changes in this patchset (it
also relies on the not-null information), so I'd like to move it
forward.

Hi Tom, Robert -- just to be sure, are you planning to take another
look at it?

Thanks
Richard
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