Re: BUG #4076: "IS NOT NULL (IS NULL)" return wrong answer even where all fields are NULL(or NOT NULL).

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: "Tatsuhito Kasahara" <kasahara(dot)tatsuhito(at)oss(dot)ntt(dot)co(dot)jp>
Cc: pgsql-bugs(at)postgresql(dot)org
Subject: Re: BUG #4076: "IS NOT NULL (IS NULL)" return wrong answer even where all fields are NULL(or NOT NULL).
Date: 2008-04-01 14:34:27
Message-ID: 1869.1207060467@sss.pgh.pa.us
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"Tatsuhito Kasahara" <kasahara(dot)tatsuhito(at)oss(dot)ntt(dot)co(dot)jp> writes:
> PostgreSQL version: 8.1.11
> Description: "IS NOT NULL (IS NULL)" return wrong answer even where
> all fields are NULL(or NOT NULL).

> I think following fix is related..
> http://archives.postgresql.org/pgsql-committers/2006-09/msg00439.php

Yup, it is. Why are you reporting this?

regards, tom lane

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