Re: BUG #12946: pg_dump/pg_restore not restore data for inherit tables

I'm sorry I made a mistake in the first case (# case 1)

Should be so:
test_inherits=> create table t1(a integer not null, b integer);
CREATE TABLE
test_inherits=> create table t2(a integer, b integer) inherits (t1);
NOTICE: merging column "a" with inherited definition
NOTICE: merging column "b" with inherited definition
CREATE TABLE
test_inherits=> insert into t1(a,b) values(null,1);
ERROR: null value in column "a" violates not-null constraint
DETAIL: Failing row contains (null, 1).
test_inherits=> insert into t2(a,b) values(null,1);
ERROR: null value in column "a" violates not-null constraint
DETAIL: Failing row contains (null, 1).

The problem with case 2 and case 3.

However, in accordance with the documentation
http://www.postgresql.org/docs/9.4/static/ddl-inherit.html(quote: "It must
also include check constraints with the same names and check expressions as
those of the parent."),
alter table t2 alter column a drop not null;
the result must be a error.

2015-04-02 18:49 GMT+05:00 Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>:

> degtyaryov(at)gmail(dot)com writes:
> > $ psql -U test -d test_inherits
> > test_inherits=> create table t1(a integer not null, b integer);
> > CREATE TABLE
> > test_inherits=> create table t2(a integer, b integer) inherits (t1);
> > CREATE TABLE
> > test_inherits=> insert into t1(a,b) values(null,1);
> > ERROR: null value in column "a" violates not-null constraint
> > DETAIL: Failing row contains (null, 1).
> > test_inherits=> insert into t2(a,b) values(null,1);
> > INSERT 0 1
> > test_inherits=> \q
>
> [ scratches head... ] When I do that, it refuses to insert into t2
> either:
>
> regression=# create table t1(a integer not null, b integer);
> CREATE TABLE
> regression=# create table t2(a integer, b integer) inherits (t1);
> NOTICE: merging column "a" with inherited definition
> NOTICE: merging column "b" with inherited definition
> CREATE TABLE
> regression=# insert into t1(a,b) values(null,1);
> ERROR: null value in column "a" violates not-null constraint
> DETAIL: Failing row contains (null, 1).
> regression=# insert into t2(a,b) values(null,1);
> ERROR: null value in column "a" violates not-null constraint
> DETAIL: Failing row contains (null, 1).
>
> This is the behavior I would expect, and I see it in all active
> branches. Have you modified the code around column inheritance?
>
> regards, tom lane
>