Re: strange IS NULL behaviour

Alvaro Herrera <alvherre@2ndquadrant.com>

From: Alvaro Herrera <alvherre@2ndquadrant.com>

To: Tom Lane <tgl@sss.pgh.pa.us>

Cc: Bruce Momjian <bruce@momjian.us>, Hannu Krosing <hannu@2ndQuadrant.com>, Peter Eisentraut <peter_e@gmx.net>, Andrew Dunstan <andrew@dunslane.net>, PostgreSQL-development <pgsql-hackers@postgresql.org>

Date: 2013-07-04T21:06:05Z

Lists: pgsql-hackers

Tom Lane wrote:

> My recollection of the previous discussion is that we didn't have
> consensus on what the "right" behavior is, so I'm not sure you can just
> assert that this patch is right.  In any case this is only touching the
> tip of the iceberg.  If we intend that rows of nulls should be null,
> then we have got issues with, for example, NOT NULL column constraint
> checks, which don't have any such recursion built into them.

FWIW if changing the behavior of NOT NULL constraints is desired, I
still have the patch to catalogue them around, if anyone wants to play
around.  I haven't gotten around to finishing it up, yet :-(

-- 
Álvaro Herrera                http://www.2ndQuadrant.com/
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