On 1 Nov 2019, at 4:17pm, Simon Slavin <[email protected]> wrote:
> This is a cut-down example, right ? You can't possibly mean to do that WHERE
> clause in production code. It amounts to
>
> WHERE (c1 IS NULL) AND (C1 != 2)
I'm so sorry. It is actually
WHERE (c1 IS NULL) OR (C1 != 2)
which could quite reasonably return rows. However, the NULL possibility may be
redundant. I can't tell without tests.
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