Lists: | pgsql-bugs |
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From: | Marek Wróbel <mwrobel(at)icentrum(dot)pl> |
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To: | pgsql-bugs(at)postgresql(dot)org |
Subject: | execute incorect query and get data |
Date: | 2006-12-14 10:43:03 |
Message-ID: | 45812AB7.8090300@icentrum.pl |
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Lists: | pgsql-bugs |
PostgreSQL : 8.2
Operating system: fedora RC4
--------
create table a (a1 integer);
create table b (b1 integer);
insert into a (a1) values (1);
insert into a (a1) values (2);
select a1 from b;
ERROR: column "a1" does not exist at character 8
but :
select a1 from a where a1 not in (select a1 from b);
a1
----
1
2
(2 rows)
when b is not empty :
insert into b (b1) values (1);
select a1 from b;
ERROR: column "a1" does not exist at character 8
but :
select a1 from a where a1 not in (select a1 from b);
a1
----
(0 rows)
select a1 from a where a1 in (select a1 from b);
a1
----
1
2
(2 rows)
From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
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To: | Marek Wróbel <mwrobel(at)icentrum(dot)pl> |
Cc: | pgsql-bugs(at)postgresql(dot)org |
Subject: | Re: execute incorect query and get data |
Date: | 2006-12-14 16:23:52 |
Message-ID: | 21281.1166113432@sss.pgh.pa.us |
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Lists: | pgsql-bugs |
=?ISO-8859-2?Q?Marek_Wr=F3bel?= <mwrobel(at)icentrum(dot)pl> writes:
> create table a (a1 integer);
> create table b (b1 integer);
> insert into a (a1) values (1);
> insert into a (a1) values (2);
> select a1 from b;
> ERROR: column "a1" does not exist at character 8
> but :
> select a1 from a where a1 not in (select a1 from b);
This is not a bug, it's an outer reference. Read any SQL book ...
regards, tom lane
From: | Marek Wróbel <mwrobel(at)icentrum(dot)pl> |
---|---|
To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Cc: | pgsql-bugs(at)postgresql(dot)org |
Subject: | Re: execute incorect query and get data |
Date: | 2006-12-15 09:01:11 |
Message-ID: | 45826457.1000804@icentrum.pl |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Lists: | pgsql-bugs |
Him,
Tom Lane napisał(a):
> =?ISO-8859-2?Q?Marek_Wr=F3bel?= <mwrobel(at)icentrum(dot)pl> writes:
>> create table a (a1 integer);
>> create table b (b1 integer);
>> insert into a (a1) values (1);
>> insert into a (a1) values (2);
>> select a1 from b;
>> ERROR: column "a1" does not exist at character 8
>> but :
>> select a1 from a where a1 not in (select a1 from b);
>
> This is not a bug, it's an outer reference. Read any SQL book ...
of course... so sorry... I was such startled off result off this query,
that I can't see that...