From: Tom Lane <tgl@sss.pgh.pa.us>
To: Andres Freund <andres@anarazel.de>
cc: David Rowley <dgrowleyml@gmail.com>, redraiment@gmail.com,
        pgsql-bugs@lists.postgresql.org
Subject: Re: BUG #19370: PG18 returns incorrect array slice results when slice
 bounds depend on another array expression
In-reply-to: <x7asrlzgreocucl4z3wdwt6ve526z35tobwao6omnbhkhsywyb@525iqsuva2v5>
References: <19370-7fb7a5854b7618f1@postgresql.org>
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 <1588384.1767715181@sss.pgh.pa.us> <1593905.1767717601@sss.pgh.pa.us>
 <x7asrlzgreocucl4z3wdwt6ve526z35tobwao6omnbhkhsywyb@525iqsuva2v5>
Comments: In-reply-to Andres Freund <andres@anarazel.de>
	message dated "Tue, 06 Jan 2026 12:42:56 -0500"
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Date: Tue, 06 Jan 2026 13:35:23 -0500
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Andres Freund <andres@anarazel.de> writes:
> On 2026-01-06 11:40:01 -0500, Tom Lane wrote:
>> We could either generalize EEOP_PARAM_SET to include an explicit
>> specification of the source value's address

> That's pretty trivial, see attached.  I don't quite understand why I did=
n't go
> that way immediately...

Yeah, that looks about right.

> At the very least we need to create a simplified testcase for the bug at=
 hand.

Yup, the sudoku example is fun but it seems inappropriate as a test
case.

>> or insert some kind of LOAD operation to copy the computed value into
>> state->resvalue/resnull. I don't see anything that looks like that toda=
y,
>> though.

> Hm, wouldn't that have exactly the same issues as we have today anyway?

Indeed ... -ENOCAFFEINE

			regards, tom lane