Mysterious column "name"

Good day!

I found one strange results for sql-query.

create table testtable (
f1 int,
f2 int
);

insert into testtable(f1, f2) values(1, 100);

select testtable.* from testtable; // it is ok

select testtable from testtable; // it is ok

select testtable.name from testtable; // returns strange result.
-----------------------------------------------------------------
name
name
-----------------------------------------------------------------
"(1,100)"
-----------------------------------------------------------------
no error message about nonexistent column.
Result is similar to second variant, but pgAdmin3 shows not full record.

for long table the result is truncated
select aaaaaa."name"
from yc_accounts aaaaaa
-----------------------------------------------------------------
name
name
-----------------------------------------------------------------
"(1154,81,testtter,"","","","","","","","","",donald22(at)126(dot)com,""
-----------------------------------------------------------------

The same results on two servers.
PostgreSQL 9.0.4 on x86_64-pc-linux-gnu, compiled by GCC gcc-4.4.real
(Debian 4.4.5-8) 4.4.5, 64-bit

PostgreSQL 9.0.4 on x86_64-pc-linux-gnu, compiled by GCC gcc-4.5.real
(Ubuntu/Linaro 4.5.2-8ubuntu4) 4.5.2, 64-bit

Is it a feature or a bug? I didn't found information in documentation
about this.

Best regards.
Nikolay.

Strange...

Tables have hidden columns but AFAIK, "name" is not one of them...

http://www.postgresql.org/docs/9.0/interactive/ddl-system-columns.html

Best,
Oliveiros

----- Original Message -----
From: "Nikolay" <wheelly(at)gmail(dot)com>
To: <pgsql-sql(at)postgresql(dot)org>
Sent: Thursday, August 04, 2011 3:50 PM
Subject: [SQL] Mysterious column "name"

> Good day!
>
> I found one strange results for sql-query.
>
> create table testtable (
> f1 int,
> f2 int
> );
>
> insert into testtable(f1, f2) values(1, 100);
>
> select testtable.* from testtable; // it is ok
>
> select testtable from testtable; // it is ok
>
> select testtable.name from testtable; // returns strange result.
> -----------------------------------------------------------------
> name
> name
> -----------------------------------------------------------------
> "(1,100)"
> -----------------------------------------------------------------
> no error message about nonexistent column.
> Result is similar to second variant, but pgAdmin3 shows not full record.
>
> for long table the result is truncated
> select aaaaaa."name"
> from yc_accounts aaaaaa
> -----------------------------------------------------------------
> name
> name
> -----------------------------------------------------------------
> "(1154,81,testtter,"","","","","","","","","",donald22(at)126(dot)com,""
> -----------------------------------------------------------------
>
> The same results on two servers.
> PostgreSQL 9.0.4 on x86_64-pc-linux-gnu, compiled by GCC gcc-4.4.real
> (Debian 4.4.5-8) 4.4.5, 64-bit
>
> PostgreSQL 9.0.4 on x86_64-pc-linux-gnu, compiled by GCC gcc-4.5.real
> (Ubuntu/Linaro 4.5.2-8ubuntu4) 4.5.2, 64-bit
>
> Is it a feature or a bug? I didn't found information in documentation
> about this.
>
>
> Best regards.
> Nikolay.
>
> --
> Sent via pgsql-sql mailing list (pgsql-sql(at)postgresql(dot)org)
> To make changes to your subscription:
> http://www.postgresql.org/mailpref/pgsql-sql

On 08/09/2011 08:34 AM, Oliveiros d'Azevedo Cristina wrote:
> Strange...
>
> Tables have hidden columns but AFAIK, "name" is not one of them...
>
> http://www.postgresql.org/docs/9.0/interactive/ddl-system-columns.html
>
> ...
>
>> Good day!
>>
>> I found one strange results for sql-query.
>>
>> create table testtable (
>> f1 int,
>> f2 int
>> );
>>
>> insert into testtable(f1, f2) values(1, 100);
>>
>> select testtable.* from testtable; // it is ok
>>
>> select testtable from testtable; // it is ok
>>
>> select testtable.name from testtable; // returns strange result.
>> -----------------------------------------------------------------
>> name
>> name
>> -----------------------------------------------------------------
>> "(1,100)"
>> -----------------------------------------------------------------
>> no error message about nonexistent column.
>> Result is similar to second variant, but pgAdmin3 shows not full record.
>> ...
>
See http://www.postgresql.org/docs/9.0/static/rowtypes.html on composite
data types and scroll to section 8.15.3.

Cheers,
Steve

Nikolay <wheelly(at)gmail(dot)com> writes:
> select testtable.name from testtable; // returns strange result.

See
http://archives.postgresql.org/pgsql-bugs/2010-10/msg00269.php

This will change in 9.1:
http://git.postgresql.org/gitweb/?p=postgresql.git&a=commitdiff&h=543d22fc7

regards, tom lane