Re: Removing all NOT NULL constraints from multiple tables easily

As far as I have been able to find (and I *could* be wrong) the only way to
remove a not null constraint (without drop/create) is to directly update the
pg_attribute.attnotnull field for the row. It is a boolean field so
updating it to 'false' does the trick. I hope this helps (and is the
correct way to do it, since this is what I have been doing!).

Darrin

>From: "Dan Browning" <danb(at)cyclonecomputers(dot)com>
>To: <pgsql-general(at)postgresql(dot)org>, <pgsql-novice(at)postgresql(dot)org>
>Subject: [GENERAL] Removing all NOT NULL constraints from multiple tables
>easily
>Date: Mon, 11 Sep 2000 06:32:27 -0700
>
>I would like to remove all NOT NULL constraints from my tables.
>
>I've tried ALTER TABLE, but I can't seem to get the syntax right, and the
>docs aren't clear to me.
>What is the correct syntax? If there's another way, short of manually
>recreating (dump, create, import) the tables, I'd love to hear it.
>
>Thanks,
>
>Dan Browning
>Network & Database Administrator
>Cyclone Computer Systems
>

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