Dear Tom Lane,
Sorry for my careless. I check my PG version again, it is 17.4. Since my PG docker' tag is latest, I mistakenly thought it was the latest version (17.5).
Thanks for your reply.
Best regards,
Jinhui
发件人：Tom Lane <tgl@sss.pgh.pa.us> 发件时间：2025年7月25日 01:33 收件人：jinhui-lai <jinhui-lai@foxmail.com> 抄送：pgsql-bugs <pgsql-bugs@lists.postgresql.org> 主题：Re: BUG #18997: Two equivalent queries return different results |
PG Bug reporting form <noreply@postgresql.org> writes:
> I think these "SELECT COUNT(c0) FILTER (WHERE c0 IS NOT NULL) FROM t0" and
> "SELECT COUNT(c0) FROM t0 WHERE c0 IS NOT NULL;" are equivalent. However,
> their results are different.
You sure your server is 17.5, and not something a little older?
There was a bug of this sort in earlier 17.x releases, but
we fixed it in 17.5. For me, both queries produce "0" as
expected.
regards, tom lane
