Re: BUG #15212: Default values in partition tables don't work as expected and allow NOT NULL violation

From: Amit Langote <Langote_Amit_f8(at)lab(dot)ntt(dot)co(dot)jp>
To: Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Amit Langote <amitlangote09(at)gmail(dot)com>
Cc: Ashutosh Bapat <ashutosh(dot)bapat(at)enterprisedb(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Jürgen Strobel <juergen+postgresql(at)strobel(dot)info>
Subject: Re: BUG #15212: Default values in partition tables don't work as expected and allow NOT NULL violation
Date: 2018-11-09 05:11:24
Message-ID: 7d42123a-2d60-2829-8d6b-0c28e3e32376@lab.ntt.co.jp
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On 2018/11/09 14:04, Amit Langote wrote:
> On 2018/11/09 4:39, Alvaro Herrera wrote:
>> and if somebody has it, a change to how defaults are applied
>> when routing tuples.
>
> I haven't written such a patch yet. Do we want such a feature?

Or is it a *bug* of tuple-routing that it doesn't substitute default
values that may be defined for partitions? It kind of looks like one if
you see an example like this.

create table p (a int, b int) partition by list (a);
create table p1 partition of p (b not null default 1) for values in (1);
insert into p1 values (1);
table p;
a │ b
───┼───
1 │ 1
(1 row)

insert into p values (1);
ERROR: null value in column "b" violates not-null constraint
DETAIL: Failing row contains (1, null).

Thanks,
Amit

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